functions/smtp.php

   1 <?php
   2
   3 /**
   4  * smtp.php
   5  *
   6  * Copyright (c) 1999-2002 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This contains all the functions needed to send messages through
  10  * an smtp server or sendmail.
  11  *
  12  * $Id$
  13  */
  14
  15 require_once(SM_PATH . 'functions/addressbook.php');
  16 require_once(SM_PATH . 'functions/plugin.php');
  17 require_once(SM_PATH . 'functions/prefs.php');
  18
  19 global $username, $popuser, $domain;
  20
  21 /* This should most probably go to some initialization... */
  22 if (ereg("^([^@%/]+)[@%/](.+)$", $username, $usernamedata)) {
  23     $popuser = $usernamedata[1];
  24     $domain  = $usernamedata[2];
  25     unset($usernamedata);
  26 } else {
  27     $popuser = $username;
  28 }
  29 /* We need domain for smtp */
  30 if (!$domain) {
  31     $domain = getenv('HOSTNAME');
  32 }
  33
  34 /* Returns true only if this message is multipart */
  35 function isMultipart ($session) {
  36     global $attachments;
  37
  38     foreach ($attachments as $info) {
  39         if ($info['session'] == $session) {
  40             return true;
  41         }
  42     }
  43     return false;
  44 }
  45
  46 /* looks up aliases in the addressbook and expands them to
  47  * the full address.
  48  *
  49  * Adds @$domain if it wasn't in the address book and if it
  50  * doesn't have an @ symbol in it
  51  */
  52 function expandAddrs ($array) {
  53     global $domain;
  54
  55     /* don't show errors -- kinda critical that we don't see
  56      * them here since the redirect won't work if we do show them
  57      */
  58     $abook = addressbook_init(false, true);
  59     for ($i=0; $i < count($array); $i++) {
  60         $result = $abook->lookup($array[$i]);
  61         $ret = "";
  62         if (isset($result['email'])) {
  63             if (isset($result['name'])) {
  64                 $ret = '"'.$result['name'].'" ';
  65             }
  66             $ret .= '<'.$result['email'].'>';
  67             $array[$i] = $ret;
  68         }
  69         else
  70         {
  71             if (strpos($array[$i], '@') === false) {
  72                 $array[$i] .= '@' . $domain;
  73             }
  74             $array[$i] = '<' . $array[$i] . '>';
  75         }
  76     }
  77     return $array;
  78 }
  79
  80 /* looks up aliases in the addressbook and expands them to
  81  * the RFC 821 valid RCPT address. ie <user@example.com>
  82  * Adds @$domain if it wasn't in the address book and if it
  83  * doesn't have an @ symbol in it
  84  */
  85 function expandRcptAddrs ($array) {
  86     global $domain;
  87
  88     /* don't show errors -- kinda critical that we don't see
  89      * them here since the redirect won't work if we do show them
  90      */
  91     $abook = addressbook_init(false, true);
  92     for ($i=0; $i < count($array); $i++) {
  93         $result = $abook->lookup($array[$i]);
  94         $ret = "";
  95         if (isset($result['email'])) {
  96             $ret = '<'.$result['email'].'>';
  97             $array[$i] = $ret;
  98         }
  99         else {
 100             if (strpos($array[$i], '@') === false) {
 101                 $array[$i] .= '@' . $domain;
 102             }
 103             $array[$i] = '<' . $array[$i] . '>';
 104         }
 105     }
 106     return $array;
 107 }
 108
 109
 110 /* Attach the files that are due to be attached
 111  */
 112 function attachFiles ($fp, $session, $rn="\r\n", $checkdot = false) {
 113     global $attachments, $attachment_dir, $username, $languages, $squirrelmail_language;
 114
 115     $length = 0;
 116
 117     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 118     if (isMultipart($session)) {
 119         foreach ($attachments as $info) {
 120             if ($info['session'] == $session) {
 121                 if (isset($info['type'])) {
 122                     $filetype = $info['type'];
 123                 }
 124                 else {
 125                     $filetype = 'application/octet-stream';
 126                 }
 127
 128                 $header = '--' . mimeBoundary() . "$rn";
 129                 if ( isset($info['remotefilename'])
 130                      && $info['remotefilename'] != '') {
 131                     $remotefilename = $info['remotefilename'];
 132                     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
 133                        function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
 134                         $remotefilename =
 135                             $languages[$squirrelmail_language]['XTRA_CODE']('encode', $remotefilename);
 136                     }
 137                     $header .= "Content-Type: $filetype; name=\"" .
 138                         encodeHeader($remotefilename) . "\"$rn";
 139                     $header .= "Content-Disposition: attachment; filename=\""
 140                         . encodeHeader($remotefilename) . "\"$rn";
 141                 } else {
 142                     $header .= "Content-Type: $filetype$rn";
 143                 }
 144
 145
 146                 /* Use 'rb' for NT systems -- read binary
 147                  * Unix doesn't care -- everything's binary!  :-)
 148                  */
 149
 150                 $filename = $hashed_attachment_dir . '/'
 151                     . $info['localfilename'];
 152                 $file = fopen ($filename, 'rb');
 153                 if (substr($filetype, 0, 5) == 'text/' ||
 154                     substr($filetype, 0, 8) == 'message/' ) {
 155                     $header .= $rn;
 156                     if ($fp) {
 157                         fputs ($fp, $header);
 158                     }
 159                     $length += strlen($header);
 160
 161                     if ($checkdot) {
 162                         $checkdot_begin=true;
 163                     } else {
 164                         $checkdot_begin=false;
 165                     }
 166
 167                     while ($tmp = fgets($file, 4096)) {
 168                         $tmp = str_replace("\r\n", "\n", $tmp);
 169                         $tmp = str_replace("\r", "\n", $tmp);
 170                         if ($rn == "\r\n"){
 171                             $tmp = str_replace("\n", "\r\n", $tmp);
 172                         }
 173                         if ($tmp{0} == '.' && $checkdot_begin) {
 174                             $tmp = '.' . $tmp;
 175                         }
 176                         if ($checkdot) {
 177                             $tmp = str_replace("\n.","\n..",$tmp);
 178                         }
 179
 180                         $tmp_length = strlen($tmp);
 181                         if ($tmp_length && $tmp{$tmp_length-1} == "\n" && $checkdot) {
 182                             $checkdot_begin = true;
 183                         } else {
 184                             $checkdot_begin = false;
 185                         }
 186
 187
 188                         if ($fp) {
 189                             fputs($fp, $tmp);
 190                         }
 191                         $length += $tmp_length;
 192                     }
 193                     if (substr($tmp, $tmp_length - strlen($rn), strlen($rn)) != $rn) {
 194                         if ($fp) {
 195                             fputs($fp, $rn);
 196                         }
 197                         $length += strlen($rn);
 198                     }
 199
 200
 201                 } else {
 202                     $header .= "Content-Transfer-Encoding: base64"
 203                         . "$rn" . "$rn";
 204                     if ($fp) fputs ($fp, $header);
 205                     $length += strlen($header);
 206                     while ($tmp = fread($file, 570)) {
 207                         $encoded = chunk_split(base64_encode($tmp));
 208                         $length += strlen($encoded);
 209                         if ($fp) fputs ($fp, $encoded);
 210                     }
 211                 }
 212                 fclose ($file);
 213             }
 214         }
 215     }
 216     return $length;
 217 }
 218
 219 /* Delete files that are uploaded for attaching
 220  */
 221 function deleteAttachments($session) {
 222     global $username, $attachments, $attachment_dir, $data_dir;
 223     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 224
 225     $rem_attachments = array();
 226     foreach ($attachments as $info) {
 227         if ($info['session'] == $session) {
 228             $attached_file = "$hashed_attachment_dir/$info[localfilename]";
 229             if (file_exists($attached_file)) {
 230                 unlink($attached_file);
 231             }
 232         } else {
 233             $rem_attachments[] = $info;
 234         }
 235     }
 236     $attachments = $rem_attachments;
 237     setPref($data_dir, $username, 'attachments', serialize($attachments));
 238 }
 239
 240 /* Return a nice MIME-boundary
 241  */
 242 function mimeBoundary () {
 243     static $mimeBoundaryString;
 244
 245     if ( !isset( $mimeBoundaryString ) ||
 246          $mimeBoundaryString == '') {
 247         $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
 248             mt_rand( 10000, 99999 );
 249     }
 250
 251     return $mimeBoundaryString;
 252 }
 253
 254 /* Time offset for correct timezone */
 255 function timezone () {
 256     global $invert_time;
 257
 258     $diff_second = date('Z');
 259     if ($invert_time) {
 260         $diff_second = - $diff_second;
 261     }
 262     if ($diff_second > 0) {
 263         $sign = '+';
 264     }
 265     else {
 266         $sign = '-';
 267     }
 268
 269     $diff_second = abs($diff_second);
 270
 271     $diff_hour = floor ($diff_second / 3600);
 272     $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 273
 274     $zonename = '('.strftime('%Z').')';
 275     $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
 276                        $zonename);
 277     return ($result);
 278 }
 279
 280 /* Print all the needed RFC822 headers */
 281 function write822Header ($fp, $t, $c, $b, $subject, $body, $more_headers, $session, $rn="\r\n") {
 282     global $data_dir, $username, $popuser, $domain, $version, $useSendmail,
 283         $default_charset, $identity, $_SERVER;
 284
 285     /* Storing the header to make sure the header is the same
 286      * everytime the header is printed.
 287      */
 288
 289     /* get those globals */
 290     $REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
 291     $SERVER_NAME = $_SERVER['SERVER_NAME'];
 292     $REMOTE_PORT = $_SERVER['REMOTE_PORT'];
 293
 294     if(isset($_SERVER['REMOTE_HOST'])) {
 295         $REMOTE_HOST = $_SERVER['REMOTE_HOST'];
 296     }
 297     if(isset($_SERVER['HTTP_VIA'])) {
 298         $HTTP_VIA = $_SERVER['HTTP_VIA'];
 299     }
 300     if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
 301         $HTTP_X_FORWARDED_FOR = $_SERVER['HTTP_X_FORWARDED_FOR'];
 302     }
 303
 304     static $header, $headerlength, $headerrn;
 305
 306     if ($header == '') {
 307                 $headerrn = $rn;
 308         $to = expandAddrs(parseAddrs($t));
 309         $cc = expandAddrs(parseAddrs($c));
 310         $bcc = expandAddrs(parseAddrs($b));
 311         if (isset($identity) && $identity != 'default') {
 312             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 313             $from = getPref($data_dir, $username, 'full_name' . $identity);
 314             $from_addr = getFrom();
 315         } else {
 316             $reply_to = getPref($data_dir, $username, 'reply_to');
 317             $from = getPref($data_dir, $username, 'full_name');
 318             $from_addr = getFrom();
 319         }
 320
 321         $to_list = getLineOfAddrs($to);
 322         $cc_list = getLineOfAddrs($cc);
 323         $bcc_list = getLineOfAddrs($bcc);
 324
 325         /* Encoding 8-bit characters and making from line */
 326         $subject = encodeHeader($subject);
 327         if ($from == '') {
 328             $from = "<$from_addr>";
 329         }
 330         else {
 331             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 332         }
 333
 334         /* This creates an RFC 822 date */
 335         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 336
 337         /* Create a message-id */
 338         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 339         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 340
 341         /* Make an RFC822 Received: line */
 342         if (isset($REMOTE_HOST)) {
 343             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 344         }
 345         else {
 346             $received_from = $REMOTE_ADDR;
 347         }
 348
 349         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 350             if ($HTTP_X_FORWARDED_FOR == '') {
 351                 $HTTP_X_FORWARDED_FOR = 'unknown';
 352             }
 353             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 354         }
 355
 356         $header  = "Received: from $received_from" . $rn;
 357         $header .= "        (SquirrelMail authenticated user $username)" . $rn;
 358         $header .= "        by $SERVER_NAME with HTTP;" . $rn;
 359         $header .= "        $date" . $rn;
 360
 361         /* Insert the rest of the header fields */
 362         $header .= "Message-ID: $message_id" . $rn;
 363         $header .= "Date: $date" . $rn;
 364         $header .= "Subject: $subject" . $rn;
 365         $header .= "From: $from" . $rn;
 366         $header .= "To: $to_list" . $rn;    // Who it's TO
 367
 368         if (isset($more_headers["Content-Type"])) {
 369             $contentType = $more_headers["Content-Type"];
 370             unset($more_headers["Content-Type"]);
 371         }
 372         else {
 373             if (isMultipart($session)) {
 374                 $contentType = "multipart/mixed;";
 375             }
 376             else {
 377                 if ($default_charset != '') {
 378                     $contentType = 'text/plain; charset='.$default_charset;
 379                 }
 380                 else {
 381                     $contentType = 'text/plain;';
 382                 }
 383             }
 384         }
 385
 386         /* Insert headers from the $more_headers array */
 387         if(is_array($more_headers)) {
 388             reset($more_headers);
 389             while(list($h_name, $h_val) = each($more_headers)) {
 390                 if ($h_name == 'References') {
 391                     $h_val = str_replace(' ', "$rn        ", $h_val);
 392                 }
 393                 $header .= sprintf("%s: %s%s", $h_name, $h_val, $rn);
 394             }
 395         }
 396
 397         if ($cc_list) {
 398             $header .= "Cc: $cc_list" . $rn; // Who the CCs are
 399         }
 400
 401         if ($reply_to != '') {
 402             $header .= "Reply-To: $reply_to" . $rn;
 403         }
 404
 405         if ($useSendmail) {
 406             if ($bcc_list) {
 407                 // BCCs is removed from header by sendmail
 408                 $header .= "Bcc: $bcc_list" . $rn;
 409             }
 410         }
 411
 412         /* Identify SquirrelMail */
 413         $header .= "X-Mailer: SquirrelMail (version $version)" . $rn;
 414
 415         /* Do the MIME-stuff */
 416         $header .= "MIME-Version: 1.0" . $rn;
 417
 418         if (isMultipart($session)) {
 419             $header .= 'Content-Type: '.$contentType.' boundary="';
 420             $header .= mimeBoundary();
 421             $header .= "\"$rn";
 422         } else {
 423             if (strtolower($default_charset) == 'iso-2022-jp') {
 424                 if (mb_detect_encoding($body) == 'ASCII') {
 425                     $header .= 'Content-Type: text/plain; US-ASCII' . $rn;
 426                     $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 427                 } else {
 428                     $header .= 'Content-Type: '.$contentType . $rn;
 429                     $header .= "Content-Transfer-Encoding: 7bit" . $rn;
 430                 }
 431             } else {
 432             $header .= 'Content-Type: ' . $contentType . $rn;
 433             $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 434         }
 435         }
 436         $header .= $rn; // One blank line to separate header and body
 437
 438         $headerlength = strlen($header);
 439     }
 440
 441         if ($headerrn != $rn) {
 442                 $header = str_replace($headerrn, $rn, $header);
 443         $headerlength = strlen($header);
 444                 $headerrn = $rn;
 445         }
 446
 447     /* Write the header */
 448     if ($fp) fputs ($fp, $header);
 449
 450     return $headerlength;
 451 }
 452
 453 /* Send the body
 454  */
 455 function writeBody ($fp, $passedBody, $session, $rn="\r\n", $checkdot = false) {
 456     global $default_charset;
 457
 458     $attachmentlength = 0;
 459
 460     if (isMultipart($session)) {
 461         $body = '--'.mimeBoundary() . $rn;
 462
 463         if ($default_charset != "") {
 464             $body .= "Content-Type: text/plain; charset=$default_charset".$rn;
 465         }
 466         else {
 467             $body .= "Content-Type: text/plain" . $rn;
 468         }
 469
 470         if (strtolower($default_charset) == 'iso-2022-jp') {
 471             if (mb_detect_encoding($passedBody) == 'ASCII') {
 472                 $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn .
 473                          $passedBody . $rn . $rn;
 474             } else {
 475                 $body .= "Content-Transfer-Encoding: 7bit\r\n\r\n" .
 476                          mb_convert_encoding($passedBody, 'JIS') . "\r\n\r\n";
 477             }
 478         } else {
 479         $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn .
 480                  $passedBody . $rn . $rn;
 481         }
 482         if ($fp) {
 483             fputs ($fp, $body);
 484         }
 485
 486         $attachmentlength = attachFiles($fp, $session, $rn, $checkdot);
 487
 488         if (!isset($postbody)) {
 489             $postbody = "";
 490         }
 491         $postbody .= $rn . "--" . mimeBoundary() . "--" . $rn . $rn;
 492         if ($fp) fputs ($fp, $postbody);
 493     } else {
 494         if (strtolower($default_charset) == 'iso-2022-jp') {
 495             $body = mb_convert_encoding($passedBody, 'JIS') . $rn;
 496         } else {
 497             $body = $passedBody . $rn;
 498         }
 499         if ($fp) {
 500             fputs ($fp, $body);
 501         }
 502         $postbody = $rn;
 503         if ($fp) {
 504             fputs ($fp, $postbody);
 505         }
 506     }
 507
 508     return (strlen($body) + strlen($postbody) + $attachmentlength);
 509 }
 510
 511
 512 /* Send mail using the sendmail command
 513  */
 514 function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) {
 515     global $sendmail_path, $popuser, $username, $domain;
 516
 517     /* Build envelope sender address. Make sure it doesn't contain
 518      * spaces or other "weird" chars that would allow a user to
 519      * exploit the shell/pipe it is used in.
 520      */
 521     $envelopefrom = getFrom();
 522     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 523     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 524     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 525
 526     /**
 527      * open pipe to sendmail or qmail-inject
 528      * (qmail-inject doesn't accept -t param)
 529      */
 530     if (strstr($sendmail_path, "qmail-inject")) {
 531         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 532     } else {
 533         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 534     }
 535
 536     $headerlength = write822Header ($fp, $t, $c, $b, $subject, $body,
 537                                     $more_headers, $session, "\n");
 538     $bodylength = writeBody($fp, $body, $session, "\n", true);
 539
 540     pclose($fp);
 541
 542     return ($headerlength + $bodylength);
 543 }
 544
 545 function smtpReadData($smtpConnection) {
 546     $read = fgets($smtpConnection, 1024);
 547     $counter = 0;
 548     while ($read) {
 549         echo $read . '<BR>';
 550         $data[$counter] = $read;
 551         $read = fgets($smtpConnection, 1024);
 552         $counter++;
 553     }
 554 }
 555
 556 function sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session) {
 557     global $username, $popuser, $domain, $version, $smtpServerAddress,
 558         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 559         $key, $onetimepad;
 560
 561     $to = expandRcptAddrs(parseAddrs($t));
 562     $cc = expandRcptAddrs(parseAddrs($c));
 563     $bcc = expandRcptAddrs(parseAddrs($b));
 564     if (isset($identity) && $identity != 'default') {
 565         $from_addr = getPref($data_dir, $username,
 566                              'email_address' . $identity);
 567     }
 568     else {
 569         $from_addr = getPref($data_dir, $username, 'email_address');
 570     }
 571
 572     if (!$from_addr) {
 573         $from_addr = "$popuser@$domain";
 574     }
 575
 576     /* POP3 BEFORE SMTP CODE HERE */
 577     global $pop_before_smtp;
 578     if (isset($pop_before_smtp) && $pop_before_smtp === true) {
 579         if (!isset($pop_port)) {
 580             $pop_port = 110;
 581         }
 582         if (!isset($pop_server)) {
 583             $pop_server = $smtpServerAddress; /* usually the same host! */
 584         }
 585         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 586         if (!$popConnection) {
 587             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 588                   . " $err_no : $err_str");
 589         } else {
 590             $tmp = fgets($popConnection, 1024); /* banner */
 591             if (!eregi("^\+OK", $tmp, $regs)) {
 592                 return(0);
 593             }
 594             fputs($popConnection, "USER $username\r\n");
 595             $tmp = fgets($popConnection, 1024);
 596             if (!eregi("^\+OK", $tmp, $regs)) {
 597                 return(0);
 598             }
 599             fputs($popConnection, 'PASS ' . OneTimePadDecrypt($key, $onetimepad) . "\r\n");
 600             $tmp = fgets($popConnection, 1024);
 601             if (!eregi("^\+OK", $tmp, $regs)) {
 602                 return(0);
 603             }
 604             fputs($popConnection, "QUIT\r\n"); /* log off */
 605             fclose($popConnection);
 606         }
 607     }
 608
 609     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort,
 610                                 $errorNumber, $errorString);
 611     if (!$smtpConnection) {
 612         echo 'Error connecting to SMTP Server.<br>';
 613         echo "$errorNumber : $errorString<br>";
 614         exit;
 615     }
 616     $tmp = fgets($smtpConnection, 1024);
 617     if (errorCheck($tmp, $smtpConnection)!=5) {
 618         return(0);
 619     }
 620
 621     $to_list = getLineOfAddrs($to);
 622     $cc_list = getLineOfAddrs($cc);
 623
 624     /* Lets introduce ourselves */
 625     if (! isset ($use_authenticated_smtp)
 626         || $use_authenticated_smtp == false) {
 627         fputs($smtpConnection, "HELO $domain\r\n");
 628         $tmp = fgets($smtpConnection, 1024);
 629         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 630     } else {
 631         fputs($smtpConnection, "EHLO $domain\r\n");
 632         $tmp = fgets($smtpConnection, 1024);
 633         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 634
 635         fputs($smtpConnection, "AUTH LOGIN\r\n");
 636         $tmp = fgets($smtpConnection, 1024);
 637         if (errorCheck($tmp, $smtpConnection)!=5) {
 638             return(0);
 639         }
 640
 641         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 642         $tmp = fgets($smtpConnection, 1024);
 643         if (errorCheck($tmp, $smtpConnection)!=5) {
 644             return(0);
 645         }
 646
 647         fputs($smtpConnection, base64_encode
 648               (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 649         $tmp = fgets($smtpConnection, 1024);
 650         if (errorCheck($tmp, $smtpConnection)!=5) {
 651             return(0);
 652         }
 653     }
 654
 655     /* Ok, who is sending the message? */
 656     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 657     $tmp = fgets($smtpConnection, 1024);
 658     if (errorCheck($tmp, $smtpConnection)!=5) {
 659         return(0);
 660     }
 661
 662     /* send who the recipients are */
 663     for ($i = 0; $i < count($to); $i++) {
 664         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 665         $tmp = fgets($smtpConnection, 1024);
 666         if (errorCheck($tmp, $smtpConnection)!=5) {
 667             return(0);
 668         }
 669     }
 670     for ($i = 0; $i < count($cc); $i++) {
 671         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 672         $tmp = fgets($smtpConnection, 1024);
 673         if (errorCheck($tmp, $smtpConnection)!=5) {
 674             return(0);
 675         }
 676     }
 677     for ($i = 0; $i < count($bcc); $i++) {
 678         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 679         $tmp = fgets($smtpConnection, 1024);
 680         if (errorCheck($tmp, $smtpConnection)!=5) {
 681             return(0);
 682         }
 683     }
 684
 685     /* Lets start sending the actual message */
 686     fputs($smtpConnection, "DATA\r\n");
 687     $tmp = fgets($smtpConnection, 1024);
 688     if (errorCheck($tmp, $smtpConnection)!=5) {
 689         return(0);
 690     }
 691
 692     /* Send the message */
 693     $headerlength = write822Header ($smtpConnection, $t, $c, $b,
 694                                     $subject, $body, $more_headers, $session);
 695     $bodylength = writeBody($smtpConnection, $body, $session,"\r\n", true);
 696
 697     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 698     $tmp = fgets($smtpConnection, 1024);
 699     $num = errorCheck($tmp, $smtpConnection, true);
 700     if ($num != 250) {
 701         return(0);
 702     }
 703
 704     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 705
 706     fclose($smtpConnection);
 707
 708     return ($headerlength + $bodylength);
 709 }
 710
 711
 712 function errorCheck($line, $smtpConnection, $verbose = false) {
 713     global $color, $compose_new_win;
 714
 715     /* Read new lines on a multiline response */
 716     $lines = $line;
 717     while(ereg("^[0-9]+-", $line)) {
 718         $line = fgets($smtpConnection, 1024);
 719         $lines .= $line;
 720     }
 721
 722     /* Status:  0 = fatal
 723      *          5 = ok
 724      */
 725     $err_num = substr($line, 0, strpos($line, " "));
 726     switch ($err_num) {
 727     case 500:   $message = 'Syntax error; command not recognized';
 728         $status = 0;
 729         break;
 730     case 501:   $message = 'Syntax error in parameters or arguments';
 731         $status = 0;
 732         break;
 733     case 502:   $message = 'Command not implemented';
 734         $status = 0;
 735         break;
 736     case 503:   $message = 'Bad sequence of commands';
 737         $status = 0;
 738         break;
 739     case 504:   $message = 'Command parameter not implemented';
 740         $status = 0;
 741         break;
 742
 743     case 211:   $message = 'System status, or system help reply';
 744         $status = 5;
 745         break;
 746     case 214:   $message = 'Help message';
 747         $status = 5;
 748         break;
 749
 750     case 220:   $message = 'Service ready';
 751         $status = 5;
 752         break;
 753     case 221:   $message = 'Service closing transmission channel';
 754         $status = 5;
 755         break;
 756
 757     case 421:   $message = 'Service not available, closing chanel';
 758         $status = 0;
 759         break;
 760
 761     case 235:   return(5);
 762         break;
 763     case 250:   $message = 'Requested mail action okay, completed';
 764         $status = 5;
 765         break;
 766     case 251:   $message = 'User not local; will forward';
 767         $status = 5;
 768         break;
 769     case 334:   return(5); break;
 770     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 771         $status = 0;
 772         break;
 773     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 774         $status = 0;
 775         break;
 776     case 451:   $message = 'Requested action aborted:  error in processing';
 777         $status = 0;
 778         break;
 779     case 551:   $message = 'User not local; please try forwarding';
 780         $status = 0;
 781         break;
 782     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 783         $status = 0;
 784         break;
 785     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 786         $status = 0;
 787         break;
 788     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 789         $status = 0;
 790         break;
 791     case 354:   $message = 'Start mail input; end with .';
 792         $status = 5;
 793         break;
 794     case 554:   $message = 'Transaction failed';
 795         $status = 0;
 796         break;
 797     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 798         $status = 0;
 799         $error_num = '001';
 800         break;
 801     }
 802
 803     if ($status == 0) {
 804         include_once(SM_PATH . 'functions/page_header.php');
 805         if ($compose_new_win == '1') {
 806             compose_Header($color, 'None');
 807         }
 808         else {
 809             displayPageHeader($color, 'None');
 810         }
 811         include_once(SM_PATH . 'functions/display_messages.php');
 812         $lines = nl2br(htmlspecialchars($lines));
 813         $msg  = $message . "<br>\nServer replied: $lines";
 814         plain_error_message($msg, $color);
 815     }
 816     if (! $verbose) return $status;
 817     return $err_num;
 818 }
 819
 820 /* create new reference header per rfc2822 */
 821
 822 function calculate_references($refs, $inreplyto, $old_reply_to) {
 823
 824     $refer = "";
 825     for ($i=1;$i<count($refs[0]);$i++) {
 826         if (!empty($refs[0][$i])) {
 827             if (preg_match("/^References:(.+)$/UAi", $refs[0][$i], $regs)) {
 828                 $refer = trim($regs[1]);
 829             }
 830             else {
 831                 $refer .= ' ' . trim($refs[0][$i]);
 832             }
 833         }
 834     }
 835     $refer_a = explode(' ', $refer);
 836     $refer = '';
 837     foreach ($refer_a as $ref) {
 838        $ref = trim($ref);
 839        if ($ref && $ref{0} == '<' && $ref{(strlen($ref)-1)} == '>') {
 840           $refer .= $ref . ' ';
 841        }
 842     }
 843     $refer = trim($refer);
 844     if (strlen($refer) > 2) {
 845         $refer .= ' ' . $inreplyto;
 846     }
 847     else {
 848         if (!empty($old_reply_to)) {
 849             $refer .= $old_reply_to . ' ' . $inreplyto;
 850         }
 851         else {
 852             $refer .= $inreplyto;
 853         }
 854     }
 855     trim($refer);
 856     return $refer;
 857 }
 858
 859 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN,
 860                      $prio = 3, $session) {
 861     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 862         $data_dir, $username, $domain, $key, $version, $sent_folder,
 863         $imapServerAddress, $imapPort, $default_use_priority, $more_headers,
 864         $request_mdn, $request_dr, $uid_support;
 865
 866     $more_headers = Array();
 867
 868     do_hook('smtp_send');
 869
 870     $imap_stream = sqimap_login($username, $key, $imapServerAddress,
 871                                 $imapPort, 1);
 872
 873     if (isset($reply_id) && $reply_id) {
 874         sqimap_mailbox_select ($imap_stream, $mailbox);
 875         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered', true);
 876
 877         /* Insert In-Reply-To and References headers if the
 878          * message-id of the message we reply to is set (longer than "<>")
 879          * The References header should really be the old Referenced header
 880          * with the message ID appended, and now it is (jmunro)
 881          */
 882         $sid = sqimap_session_id($uid_support);
 883         $query = "$sid FETCH $reply_id (BODY.PEEK[HEADER.FIELDS (Message-Id In-Reply-To)])\r\n";
 884         fputs ($imap_stream, $query);
 885         $read = sqimap_read_data($imap_stream, $sid, true, $response, $message);
 886         $message_id = '';
 887         $in_reply_to = '';
 888
 889         foreach ($read as $r) {
 890                 if (preg_match("/^message-id:(.*)/iA", $r, $regs)) {
 891                     $message_id = trim($regs[1]);
 892                 }
 893                 if (preg_match("/^in-reply-to:(.*)/iA", $r, $regs)) {
 894                     $in_reply_to = trim($regs[1]);
 895                 }
 896         }
 897
 898         if(strlen($message_id) > 2) {
 899             $refs = get_reference_header ($imap_stream, $reply_id);
 900             $inreplyto = $message_id;
 901             $old_reply_to = $in_reply_to;
 902             $refer = calculate_references ($refs, $inreplyto, $old_reply_to);
 903             $more_headers['In-Reply-To'] = $inreplyto;
 904             $more_headers['References']  = $refer;
 905         }
 906
 907     }
 908     if ($default_use_priority) {
 909         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 910     }
 911
 912     $requestRecipt = 0;
 913     if (isset($request_dr)) {
 914         $requestRecipt += 1;
 915     }
 916     if (isset($request_mdn)) {
 917         $requestRecipt += 2;
 918     }
 919     if ( $requestRecipt > 0) {
 920         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 921     }
 922     if ($MDN) {
 923         $more_headers["Content-Type"] = "multipart/report; ".
 924             "report-type=disposition-notification;";
 925     }
 926     $imap_body = $body;
 927     if ($useSendmail) {
 928         /* In order to remove the problem of users not able to create
 929          * messages with "." on a blank line, RFC821 has made provision
 930          * in section 4.5.2 (Transparency).
 931          */
 932          if (($body && $body{0} == '.')) {
 933              $body = '.' . $body;
 934          }
 935          $body = str_replace("\n.","\n..",$body);
 936          $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers,
 937                                $session);
 938     } else {
 939        /* In order to remove the problem of users not able to create
 940         * messages with "." on a blank line, RFC821 has made provision
 941         * in section 4.5.2 (Transparency).
 942         */
 943         if (($body && $body{0} == '.')) {
 944             $body = '.' . $body;
 945         }
 946         $body = str_replace("\n.","\n..",$body);
 947         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers,
 948                            $session);
 949     }
 950     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 951         $body = $imap_body;
 952         $body = ereg_replace("\n", "\r\n", $body);
 953         $headerlength = write822Header (false, $t, $c, $b, $subject, $body, $more_headers, $session, "\r\n");
 954         $bodylength = writeBody(false, $body, $session, "\r\n");
 955         $length = $headerlength + $bodylength;
 956         sqimap_append ($imap_stream, $sent_folder, $length);
 957         write822Header ($imap_stream, $t, $c, $b, $subject, $body, $more_headers,
 958                         $session);
 959         writeBody ($imap_stream, $body, $session);
 960         sqimap_append_done ($imap_stream);
 961     }
 962     sqimap_logout($imap_stream);
 963     /* Delete the files uploaded for attaching (if any).
 964      * only if $length != 0 (if there was no error)
 965      */
 966     if ($length) {
 967         ClearAttachments($session);
 968     }
 969     return $length;
 970 }
 971
 972 function createPriorityHeaders($prio) {
 973     $prio_headers = Array();
 974     $prio_headers['X-Priority'] = $prio;
 975
 976     switch($prio) {
 977     case 1:
 978         $prio_headers['Importance'] = 'High';
 979         break;
 980
 981     case 3:
 982         $prio_headers['Importance'] = 'Normal';
 983         break;
 984
 985     case 5:
 986         $prio_headers['Importance'] = 'Low';
 987         break;
 988     }
 989     return  $prio_headers;
 990 }
 991
 992 function createReceiptHeaders($receipt) {
 993
 994     GLOBAL $data_dir, $username, $identity, $popuser, $domain;
 995
 996     $receipt_headers = Array();
 997     if (isset($identity) && $identity != 'default') {
 998         $from = getPref($data_dir, $username, 'full_name' . $identity);
 999         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
1000     } else {
1001         $from = getPref($data_dir, $username, 'full_name');
1002         $from_addr = getPref($data_dir, $username, 'email_address');
1003     }
1004     if ($from_addr == '') {
1005         $from_addr = $popuser.'@'.$domain;
1006     }
1007
1008     if ($from == '') {
1009         $from = "<$from_addr>";
1010     }
1011     else {
1012         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
1013     }
1014
1015     /* On Delivery */
1016     if ( $receipt == 1
1017         || $receipt == 3 ) {
1018         $receipt_headers["Return-Receipt-To"] = $from;
1019     }
1020     /* On Read */
1021     if ($receipt == 2
1022         || $receipt == 3 ) {
1023         /* Pegasus Mail */
1024         $receipt_headers["X-Confirm-Reading-To"] = $from;
1025         /* RFC 2298 */
1026         $receipt_headers["Disposition-Notification-To"] = $from;
1027     }
1028     return $receipt_headers;
1029 }
1030
1031 /* Figure out what the 'From:' address is
1032  */
1033
1034 function getFrom() {
1035     global $username, $popuser, $domain, $data_dir, $identity;
1036     if (isset($identity) && $identity != 'default') {
1037         $from_addr = getPref($data_dir, $username,
1038                              'email_address' . $identity);
1039     }
1040     else {
1041         $from_addr = getPref($data_dir, $username, 'email_address');
1042     }
1043
1044     if (!$from_addr) {
1045         $from_addr = "$popuser@$domain";
1046     }
1047     return $from_addr;
1048 }
1049
1050
1051 ?>