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