functions/smtp.php

   1 <?php
   2    /** smtp.php
   3     **
   4     ** This contains all the functions needed to send messages through
   5     ** an smtp server or sendmail.
   6     **
   7     ** $Id$
   8     **/
   9
  10    if (defined('smtp_php'))
  11       return;
  12    define('smtp_php', true);
  13
  14    require_once('../functions/addressbook.php');
  15    require_once('../functions/plugin.php');
  16
  17    global $username, $popuser, $domain;
  18
  19    // This should most probably go to some initialization...
  20    if (ereg("^([^@%/]+)[@%/](.+)$", $username, $usernamedata)) {
  21       $popuser = $usernamedata[1];
  22       $domain  = $usernamedata[2];
  23           unset($usernamedata);
  24    } else {
  25       $popuser = $username;
  26    }
  27    // We need domain for smtp
  28    if (!$domain)
  29       $domain = getenv('HOSTNAME');
  30
  31    // Returns true only if this message is multipart
  32    function isMultipart () {
  33       global $attachments;
  34
  35       if (count($attachments)>0)
  36          return true;
  37       else
  38          return false;
  39    }
  40
  41    // looks up aliases in the addressbook and expands them to
  42    // the full address.
  43    // Adds @$domain if it wasn't in the address book and if it
  44    // doesn't have an @ symbol in it
  45    function expandAddrs ($array) {
  46       global $domain;
  47
  48       // don't show errors -- kinda critical that we don't see
  49       // them here since the redirect won't work if we do show them
  50       $abook = addressbook_init(false);
  51       for ($i=0; $i < count($array); $i++) {
  52          $result = $abook->lookup($array[$i]);
  53          $ret = "";
  54          if (isset($result['email'])) {
  55             if (isset($result['name'])) {
  56                $ret = '"'.$result['name'].'" ';
  57             }
  58             $ret .= '<'.$result['email'].'>';
  59             $array[$i] = $ret;
  60          }
  61          else
  62          {
  63             if (strpos($array[$i], '@') === false)
  64                $array[$i] .= '@' . $domain;
  65             $array[$i] = '<' . $array[$i] . '>';
  66          }
  67       }
  68       return $array;
  69    }
  70
  71
  72    // looks up aliases in the addressbook and expands them to
  73    // the RFC 821 valid RCPT address. ie <user@example.com>
  74    // Adds @$domain if it wasn't in the address book and if it
  75    // doesn't have an @ symbol in it
  76    function expandRcptAddrs ($array) {
  77       global $domain;
  78
  79       // don't show errors -- kinda critical that we don't see
  80       // them here since the redirect won't work if we do show them
  81       $abook = addressbook_init(false);
  82       for ($i=0; $i < count($array); $i++) {
  83          $result = $abook->lookup($array[$i]);
  84          $ret = "";
  85          if (isset($result['email'])) {
  86             $ret = '<'.$result['email'].'>';
  87             $array[$i] = $ret;
  88          }
  89          else
  90          {
  91             if (strpos($array[$i], '@') === false)
  92                $array[$i] .= '@' . $domain;
  93             $array[$i] = '<' . $array[$i] . '>';
  94          }
  95       }
  96       return $array;
  97    }
  98
  99
 100    // Attach the files that are due to be attached
 101    function attachFiles ($fp) {
 102       global $attachments, $attachment_dir;
 103
 104       $length = 0;
 105
 106       if (isMultipart()) {
 107          foreach ($attachments as $info)
 108          {
 109             if (isset($info['type']))
 110                $filetype = $info['type'];
 111             else
 112                $filetype = 'application/octet-stream';
 113
 114             $header = '--'.mimeBoundary()."\r\n";
 115             $header .= "Content-Type: $filetype; name=\"" .
 116                 $info['remotefilename'] . "\"\r\n";
 117             $header .= "Content-Disposition: attachment; filename=\"" .
 118                 $info['remotefilename'] . "\"\r\n";
 119
 120             // Use 'rb' for NT systems -- read binary
 121             // Unix doesn't care -- everything's binary!  :-)
 122             $file = fopen ($attachment_dir . $info['localfilename'], 'rb');
 123             if (substr($filetype, 0, 5) == 'text/' ||
 124                 $filetype == 'message/rfc822') {
 125                $header .= "\r\n";
 126                fputs ($fp, $header);
 127                $length += strlen($header);
 128                while ($tmp = fgets($file, 4096)) {
 129                   $tmp = str_replace("\r\n", "\n", $tmp);
 130                   $tmp = str_replace("\r", "\n", $tmp);
 131                   $tmp = str_replace("\n", "\r\n", $tmp);
 132                   if (feof($fp) && substr($tmp, -2) != "\r\n")
 133                      $tmp .= "\r\n";
 134                   fputs($fp, $tmp);
 135                   $length += strlen($tmp);
 136                }
 137             } else {
 138                $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
 139                fputs ($fp, $header);
 140                $length += strlen($header);
 141                while ($tmp = fread($file, 570)) {
 142                   $encoded = chunk_split(base64_encode($tmp));
 143                   $length += strlen($encoded);
 144                   fputs ($fp, $encoded);
 145                }
 146             }
 147             fclose ($file);
 148          }
 149       }
 150
 151       return $length;
 152    }
 153
 154    // Delete files that are uploaded for attaching
 155    function deleteAttachments() {
 156       global $attachments, $attachment_dir;
 157
 158       if (isMultipart()) {
 159          reset($attachments);
 160          while (list($localname, $remotename) = each($attachments)) {
 161             if (!ereg ("\\/", $localname)) {
 162                unlink ($attachment_dir.$localname);
 163                unlink ($attachment_dir.$localname.'.info');
 164             }
 165          }
 166       }
 167    }
 168
 169    // Return a nice MIME-boundary
 170    function mimeBoundary () {
 171       static $mimeBoundaryString;
 172
 173       if ($mimeBoundaryString == "") {
 174          $mimeBoundaryString = "----=_" .
 175              GenerateRandomString(60, '\'()+,-./:=?_', 7);
 176       }
 177
 178       return $mimeBoundaryString;
 179    }
 180
 181    /* Time offset for correct timezone */
 182    function timezone () {
 183       global $invert_time;
 184
 185       $diff_second = date('Z');
 186       if ($invert_time)
 187           $diff_second = - $diff_second;
 188       if ($diff_second > 0)
 189          $sign = '+';
 190       else
 191          $sign = '-';
 192
 193       $diff_second = abs($diff_second);
 194
 195       $diff_hour = floor ($diff_second / 3600);
 196       $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 197
 198       $zonename = '('.strftime('%Z').')';
 199       $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
 200       return ($result);
 201    }
 202
 203    /* Print all the needed RFC822 headers */
 204    function write822Header ($fp, $t, $c, $b, $subject, $more_headers) {
 205       global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 206       global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 207       global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 208       global $REMOTE_HOST, $identity;
 209
 210       // Storing the header to make sure the header is the same
 211       // everytime the header is printed.
 212       static $header, $headerlength;
 213
 214       if ($header == '') {
 215          $to = expandAddrs(parseAddrs($t));
 216          $cc = expandAddrs(parseAddrs($c));
 217          $bcc = expandAddrs(parseAddrs($b));
 218          if (isset($identity) && $identity != 'default')
 219          {
 220             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 221             $from = getPref($data_dir, $username, 'full_name' . $identity);
 222             $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 223          }
 224          else
 225          {
 226             $reply_to = getPref($data_dir, $username, 'reply_to');
 227             $from = getPref($data_dir, $username, 'full_name');
 228             $from_addr = getPref($data_dir, $username, 'email_address');
 229          }
 230
 231          if ($from_addr == '')
 232             $from_addr = $popuser.'@'.$domain;
 233
 234          $to_list = getLineOfAddrs($to);
 235          $cc_list = getLineOfAddrs($cc);
 236          $bcc_list = getLineOfAddrs($bcc);
 237
 238          /* Encoding 8-bit characters and making from line */
 239          $subject = encodeHeader($subject);
 240          if ($from == '')
 241             $from = "<$from_addr>";
 242          else
 243             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 244
 245          /* This creates an RFC 822 date */
 246          $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 247
 248          /* Create a message-id */
 249          $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 250          $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 251
 252          /* Make an RFC822 Received: line */
 253          if (isset($REMOTE_HOST))
 254             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 255          else
 256             $received_from = $REMOTE_ADDR;
 257
 258          if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 259             if ($HTTP_X_FORWARDED_FOR == '')
 260                $HTTP_X_FORWARDED_FOR = 'unknown';
 261             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 262          }
 263
 264          $header  = "Received: from $received_from\r\n";
 265          $header .= "        (SquirrelMail authenticated user $username)\r\n";
 266          $header .= "        by $SERVER_NAME with HTTP;\r\n";
 267          $header .= "        $date\r\n";
 268
 269          /* Insert the rest of the header fields */
 270          $header .= "Message-ID: $message_id\r\n";
 271          $header .= "Date: $date\r\n";
 272          $header .= "Subject: $subject\r\n";
 273          $header .= "From: $from\r\n";
 274          $header .= "To: $to_list\r\n";    // Who it's TO
 275
 276          /* Insert headers from the $more_headers array */
 277          if(is_array($more_headers)) {
 278             reset($more_headers);
 279             while(list($h_name, $h_val) = each($more_headers)) {
 280                $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 281             }
 282          }
 283
 284          if ($cc_list) {
 285             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 286          }
 287
 288          if ($reply_to != '')
 289             $header .= "Reply-To: $reply_to\r\n";
 290
 291          if ($useSendmail) {
 292             if ($bcc_list) {
 293                // BCCs is removed from header by sendmail
 294                $header .= "Bcc: $bcc_list\r\n";
 295             }
 296          }
 297
 298          $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; // Identify SquirrelMail
 299
 300          // Do the MIME-stuff
 301          $header .= "MIME-Version: 1.0\r\n";
 302
 303          if (isMultipart()) {
 304             $header .= 'Content-Type: multipart/mixed; boundary="';
 305             $header .= mimeBoundary();
 306             $header .= "\"\r\n";
 307          } else {
 308             if ($default_charset != '')
 309                $header .= "Content-Type: text/plain; charset=$default_charset\r\n";
 310             else
 311                $header .= "Content-Type: text/plain;\r\n";
 312             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 313          }
 314          $header .= "\r\n"; // One blank line to separate header and body
 315
 316          $headerlength = strlen($header);
 317       }
 318
 319       // Write the header
 320       fputs ($fp, $header);
 321
 322       return $headerlength;
 323    }
 324
 325    // Send the body
 326    function writeBody ($fp, $passedBody) {
 327       global $default_charset;
 328
 329       $attachmentlength = 0;
 330
 331       if (isMultipart()) {
 332          $body = '--'.mimeBoundary()."\r\n";
 333
 334          if ($default_charset != "")
 335             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 336          else
 337             $body .= "Content-Type: text/plain\r\n";
 338
 339          $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 340          $body .= $passedBody . "\r\n\r\n";
 341          fputs ($fp, $body);
 342
 343          $attachmentlength = attachFiles($fp);
 344
 345          if (!isset($postbody)) $postbody = "";
 346          $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 347          fputs ($fp, $postbody);
 348       } else {
 349          $body = $passedBody . "\r\n";
 350          fputs ($fp, $body);
 351          $postbody = "\r\n";
 352          fputs ($fp, $postbody);
 353       }
 354
 355       return (strlen($body) + strlen($postbody) + $attachmentlength);
 356    }
 357
 358    // Send mail using the sendmail command
 359    function sendSendmail($t, $c, $b, $subject, $body, $more_headers) {
 360       global $sendmail_path, $popuser, $username, $domain;
 361
 362       // Build envelope sender address. Make sure it doesn't contain
 363       // spaces or other "weird" chars that would allow a user to
 364       // exploit the shell/pipe it is used in.
 365       $envelopefrom = "$popuser@$domain";
 366       $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 367       $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 368       $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 369
 370       // open pipe to sendmail or qmail-inject (qmail-inject doesn't accept -t param)
 371       if (strstr($sendmail_path, "qmail-inject")) {
 372          $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 373       } else {
 374          $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 375       }
 376
 377       $headerlength = write822Header ($fp, $t, $c, $b, $subject, $more_headers);
 378       $bodylength = writeBody($fp, $body);
 379
 380       pclose($fp);
 381
 382       return ($headerlength + $bodylength);
 383    }
 384
 385    function smtpReadData($smtpConnection) {
 386       $read = fgets($smtpConnection, 1024);
 387       $counter = 0;
 388       while ($read) {
 389          echo $read . '<BR>';
 390          $data[$counter] = $read;
 391          $read = fgets($smtpConnection, 1024);
 392          $counter++;
 393       }
 394    }
 395
 396    function sendSMTP($t, $c, $b, $subject, $body, $more_headers) {
 397       global $username, $popuser, $domain, $version, $smtpServerAddress,
 398          $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 399          $key, $onetimepad;
 400
 401       $to = expandRcptAddrs(parseAddrs($t));
 402       $cc = expandRcptAddrs(parseAddrs($c));
 403       $bcc = expandRcptAddrs(parseAddrs($b));
 404       if (isset($identity) && $identity != 'default')
 405          $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 406       else
 407          $from_addr = getPref($data_dir, $username, 'email_address');
 408
 409       if (!$from_addr)
 410          $from_addr = "$popuser@$domain";
 411
 412       $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 413       if (!$smtpConnection) {
 414          echo 'Error connecting to SMTP Server.<br>';
 415          echo "$errorNumber : $errorString<br>";
 416          exit;
 417       }
 418       $tmp = fgets($smtpConnection, 1024);
 419       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 420
 421       $to_list = getLineOfAddrs($to);
 422       $cc_list = getLineOfAddrs($cc);
 423
 424       /** Lets introduce ourselves */
 425       if (! isset ($use_authenticated_smtp) || $use_authenticated_smtp == false) {
 426          fputs($smtpConnection, "HELO $domain\r\n");
 427          $tmp = fgets($smtpConnection, 1024);
 428       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 429       } else {
 430          fputs($smtpConnection, "EHLO $domain\r\n");
 431          $tmp = fgets($smtpConnection, 1024);
 432          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 433
 434          fputs($smtpConnection, "AUTH LOGIN\r\n");
 435          $tmp = fgets($smtpConnection, 1024);
 436          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 437
 438          fputs($smtpConnection, base64_encode ($username) . "\r\n");
 439          $tmp = fgets($smtpConnection, 1024);
 440          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 441
 442          fputs($smtpConnection, base64_encode (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 443          $tmp = fgets($smtpConnection, 1024);
 444          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 445       }
 446
 447       /** Ok, who is sending the message? */
 448       fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 449       $tmp = fgets($smtpConnection, 1024);
 450       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 451
 452       /** send who the recipients are */
 453       for ($i = 0; $i < count($to); $i++) {
 454          fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 455          $tmp = fgets($smtpConnection, 1024);
 456          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 457       }
 458       for ($i = 0; $i < count($cc); $i++) {
 459          fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 460          $tmp = fgets($smtpConnection, 1024);
 461          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 462       }
 463       for ($i = 0; $i < count($bcc); $i++) {
 464          fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 465          $tmp = fgets($smtpConnection, 1024);
 466          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 467       }
 468
 469       /** Lets start sending the actual message */
 470       fputs($smtpConnection, "DATA\r\n");
 471       $tmp = fgets($smtpConnection, 1024);
 472       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 473
 474       // Send the message
 475       $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $more_headers);
 476       $bodylength = writeBody($smtpConnection, $body);
 477
 478       fputs($smtpConnection, ".\r\n"); // end the DATA part
 479       $tmp = fgets($smtpConnection, 1024);
 480       $num = errorCheck($tmp, $smtpConnection, true);
 481       if ($num != 250) {
 482          $tmp = nl2br(htmlspecialchars($tmp));
 483          displayPageHeader($color, 'None');
 484          include_once('../functions/display_messages.php');
 485          $msg  = "Message not sent!<br>\nReason given: $tmp";
 486          plain_error_message($msg, $color);
 487          return(0);
 488       }
 489
 490       fputs($smtpConnection, "QUIT\r\n"); // log off
 491
 492       fclose($smtpConnection);
 493
 494       return ($headerlength + $bodylength);
 495    }
 496
 497
 498    function errorCheck($line, $smtpConnection, $verbose = false) {
 499       global $color;
 500
 501       // Read new lines on a multiline response
 502       $lines = $line;
 503       while(ereg("^[0-9]+-", $line)) {
 504          $line = fgets($smtpConnection, 1024);
 505          $lines .= $line;
 506       }
 507
 508       // Status:  0 = fatal
 509       //          5 = ok
 510
 511       $err_num = substr($line, 0, strpos($line, " "));
 512       switch ($err_num) {
 513          case 500:   $message = 'Syntax error; command not recognized';
 514                      $status = 0;
 515                      break;
 516          case 501:   $message = 'Syntax error in parameters or arguments';
 517                      $status = 0;
 518                      break;
 519          case 502:   $message = 'Command not implemented';
 520                      $status = 0;
 521                      break;
 522          case 503:   $message = 'Bad sequence of commands';
 523                      $status = 0;
 524                      break;
 525          case 504:   $message = 'Command parameter not implemented';
 526                      $status = 0;
 527                      break;
 528
 529
 530          case 211:   $message = 'System status, or system help reply';
 531                      $status = 5;
 532                      break;
 533          case 214:   $message = 'Help message';
 534                      $status = 5;
 535                      break;
 536
 537
 538          case 220:   $message = 'Service ready';
 539                      $status = 5;
 540                      break;
 541          case 221:   $message = 'Service closing transmission channel';
 542                      $status = 5;
 543                      break;
 544          case 421:   $message = 'Service not available, closing chanel';
 545                      $status = 0;
 546                      break;
 547
 548          case 235:   return(5); break;
 549          case 250:   $message = 'Requested mail action okay, completed';
 550                      $status = 5;
 551                      break;
 552          case 251:   $message = 'User not local; will forward';
 553                      $status = 5;
 554                      break;
 555          case 334:   return(5); break;
 556          case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 557                      $status = 0;
 558                      break;
 559          case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 560                      $status = 0;
 561                      break;
 562          case 451:   $message = 'Requested action aborted:  error in processing';
 563                      $status = 0;
 564                      break;
 565          case 551:   $message = 'User not local; please try forwarding';
 566                      $status = 0;
 567                      break;
 568          case 452:   $message = 'Requested action not taken:  insufficient system storage';
 569                      $status = 0;
 570                      break;
 571          case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 572                      $status = 0;
 573                      break;
 574          case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 575                      $status = 0;
 576                      break;
 577          case 354:   $message = 'Start mail input; end with .';
 578                      $status = 5;
 579                      break;
 580          case 554:   $message = 'Transaction failed';
 581                      $status = 0;
 582                      break;
 583          default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 584                      $status = 0;
 585                      $error_num = '001';
 586                      break;
 587       }
 588
 589       if ($status == 0) {
 590          include_once('../functions/page_header.php');
 591          displayPageHeader($color, 'None');
 592          include_once('../functions/display_messages.php');
 593          $lines = nl2br(htmlspecialchars($lines));
 594                  $msg  = $message . "<br>\nServer replied: $lines";
 595                  plain_error_message($msg, $color);
 596       }
 597       if (! $verbose) return $status;
 598       return $err_num;
 599    }
 600
 601    function sendMessage($t, $c, $b, $subject, $body, $reply_id, $prio = 3) {
 602       global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad;
 603       global $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress, $imapPort;
 604       global $default_use_priority;
 605       global $more_headers;
 606       $more_headers = Array();
 607
 608       do_hook("smtp_send");
 609
 610       $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 611
 612       if (isset($reply_id) && $reply_id) {
 613          sqimap_mailbox_select ($imap_stream, $mailbox);
 614          sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 615
 616          // Insert In-Reply-To and References headers if the
 617          // message-id of the message we reply to is set (longer than "<>")
 618          // The References header should really be the old Referenced header
 619          // with the message ID appended, but it can be only the message ID too.
 620          $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 621          if(strlen($hdr->message_id) > 2) {
 622             $more_headers['In-Reply-To'] = $hdr->message_id;
 623             $more_headers['References']  = $hdr->message_id;
 624          }
 625       }
 626       if ($default_use_priority) {
 627         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 628       }
 629
 630       // In order to remove the problem of users not able to create
 631       // messages with "." on a blank line, RFC821 has made provision
 632       // in section 4.5.2 (Transparency).
 633       $body = ereg_replace("\n\\.", "\n..", $body);
 634       $body = ereg_replace("^\\.", "..", $body);
 635
 636       // this is to catch all plain \n instances and
 637       // replace them with \r\n.  All newlines were converted
 638       // into just \n inside the compose.php file.
 639       $body = ereg_replace("\n", "\r\n", $body);
 640
 641       if ($useSendmail) {
 642          $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers);
 643       } else {
 644          $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers);
 645       }
 646
 647       if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 648          sqimap_append ($imap_stream, $sent_folder, $length);
 649          write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers);
 650          writeBody ($imap_stream, $body);
 651          sqimap_append_done ($imap_stream);
 652       }
 653       sqimap_logout($imap_stream);
 654       // Delete the files uploaded for attaching (if any).
 655       // only if $length != 0 (if there was no error)
 656       if ($length)
 657          ClearAttachments();
 658
 659       return $length;
 660    }
 661
 662    function createPriorityHeaders($prio) {
 663      $prio_headers = Array();
 664      $prio_headers["X-Priority"] = $prio;
 665
 666      switch($prio) {
 667      case 1: $prio_headers["Importance"] = "High";
 668        $prio_headers["X-MSMail-Priority"] = "High";
 669        break;
 670
 671      case 3: $prio_headers["Importance"] = "Normal";
 672        $prio_headers["X-MSMail-Priority"] = "Normal";
 673        break;
 674
 675      case 5:
 676        $prio_headers["Importance"] = "Low";
 677        $prio_headers["X-MSMail-Priority"] = "Low";
 678        break;
 679      }
 680      return  $prio_headers;
 681    }
 682 ?>