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