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 /*****************************************************************/
  16 /*** THIS FILE NEEDS TO HAVE ITS FORMATTING FIXED!!!           ***/
  17 /*** PLEASE DO SO AND REMOVE THIS COMMENT SECTION.             ***/
  18 /***    + Base level indent should begin at left margin, as    ***/
  19 /***      the require_once and global lines below.             ***/
  20 /***    + All identation should consist of four space blocks   ***/
  21 /***    + Tab characters are evil.                             ***/
  22 /***    + all comments should use "slash-star ... star-slash"  ***/
  23 /***      style -- no pound characters, no slash-slash style   ***/
  24 /***    + FLOW CONTROL STATEMENTS (if, while, etc) SHOULD      ***/
  25 /***      ALWAYS USE { AND } CHARACTERS!!!                     ***/
  26 /***    + Please use ' instead of ", when possible. Note "     ***/
  27 /***      should always be used in _( ) function calls.        ***/
  28 /*** Thank you for your help making the SM code more readable. ***/
  29 /*****************************************************************/
  30
  31 require_once('../functions/addressbook.php');
  32 require_once('../functions/plugin.php');
  33 require_once('../functions/prefs.php');
  34
  35 global $username, $popuser, $domain;
  36
  37    // This should most probably go to some initialization...
  38    if (ereg("^([^@%/]+)[@%/](.+)$", $username, $usernamedata)) {
  39       $popuser = $usernamedata[1];
  40       $domain  = $usernamedata[2];
  41       unset($usernamedata);
  42    } else {
  43       $popuser = $username;
  44    }
  45    // We need domain for smtp
  46    if (!$domain)
  47       $domain = getenv('HOSTNAME');
  48
  49    // Returns true only if this message is multipart
  50    function isMultipart () {
  51       global $attachments;
  52
  53       if (count($attachments)>0)
  54          return true;
  55       else
  56          return false;
  57    }
  58
  59    // looks up aliases in the addressbook and expands them to
  60    // the full address.
  61    // Adds @$domain if it wasn't in the address book and if it
  62    // doesn't have an @ symbol in it
  63    function expandAddrs ($array) {
  64       global $domain;
  65
  66       // don't show errors -- kinda critical that we don't see
  67       // them here since the redirect won't work if we do show them
  68       $abook = addressbook_init(false);
  69       for ($i=0; $i < count($array); $i++) {
  70          $result = $abook->lookup($array[$i]);
  71          $ret = "";
  72          if (isset($result['email'])) {
  73             if (isset($result['name'])) {
  74                $ret = '"'.$result['name'].'" ';
  75             }
  76             $ret .= '<'.$result['email'].'>';
  77             $array[$i] = $ret;
  78          }
  79          else
  80          {
  81             if (strpos($array[$i], '@') === false)
  82                $array[$i] .= '@' . $domain;
  83             $array[$i] = '<' . $array[$i] . '>';
  84          }
  85       }
  86       return $array;
  87    }
  88
  89
  90    // looks up aliases in the addressbook and expands them to
  91    // the RFC 821 valid RCPT address. ie <user@example.com>
  92    // Adds @$domain if it wasn't in the address book and if it
  93    // doesn't have an @ symbol in it
  94    function expandRcptAddrs ($array) {
  95       global $domain;
  96
  97       // don't show errors -- kinda critical that we don't see
  98       // them here since the redirect won't work if we do show them
  99       $abook = addressbook_init(false);
 100       for ($i=0; $i < count($array); $i++) {
 101          $result = $abook->lookup($array[$i]);
 102          $ret = "";
 103          if (isset($result['email'])) {
 104             $ret = '<'.$result['email'].'>';
 105             $array[$i] = $ret;
 106          }
 107          else
 108          {
 109             if (strpos($array[$i], '@') === false)
 110                $array[$i] .= '@' . $domain;
 111             $array[$i] = '<' . $array[$i] . '>';
 112          }
 113       }
 114       return $array;
 115    }
 116
 117
 118    // Attach the files that are due to be attached
 119    function attachFiles ($fp) {
 120       global $attachments, $attachment_dir, $username;
 121
 122       $length = 0;
 123
 124       $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 125       if (isMultipart()) {
 126          foreach ($attachments as $info)
 127          {
 128             if (isset($info['type']))
 129                $filetype = $info['type'];
 130             else
 131                $filetype = 'application/octet-stream';
 132
 133             $header = '--'.mimeBoundary()."\r\n";
 134             $header .= "Content-Type: $filetype; name=\"" .
 135                 $info['remotefilename'] . "\"\r\n";
 136             $header .= "Content-Disposition: attachment; filename=\"" .
 137                 $info['remotefilename'] . "\"\r\n";
 138
 139             // Use 'rb' for NT systems -- read binary
 140             // Unix doesn't care -- everything's binary!  :-)
 141
 142             $filename = $hashed_attachment_dir . '/' . $info['localfilename'];
 143             $file = fopen ($filename, 'rb');
 144             if (substr($filetype, 0, 5) == 'text/' ||
 145                 $filetype == 'message/rfc822') {
 146                $header .= "\r\n";
 147                fputs ($fp, $header);
 148                $length += strlen($header);
 149                while ($tmp = fgets($file, 4096)) {
 150                   $tmp = str_replace("\r\n", "\n", $tmp);
 151                   $tmp = str_replace("\r", "\n", $tmp);
 152                   $tmp = str_replace("\n", "\r\n", $tmp);
 153                   if (feof($fp) && substr($tmp, -2) != "\r\n")
 154                      $tmp .= "\r\n";
 155                   fputs($fp, $tmp);
 156                   $length += strlen($tmp);
 157                }
 158             } else {
 159                $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
 160                fputs ($fp, $header);
 161                $length += strlen($header);
 162                while ($tmp = fread($file, 570)) {
 163                   $encoded = chunk_split(base64_encode($tmp));
 164                   $length += strlen($encoded);
 165                   fputs ($fp, $encoded);
 166                }
 167             }
 168             fclose ($file);
 169          }
 170       }
 171
 172       return $length;
 173    }
 174
 175    // Delete files that are uploaded for attaching
 176    function deleteAttachments() {
 177       global $attachments, $attachment_dir;
 178
 179       $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 180       if (isMultipart()) {
 181          reset($attachments);
 182          while (list($localname, $remotename) = each($attachments)) {
 183             if (!ereg ("\\/", $localname)) {
 184                $filename = $hashed_attachment_dir . '/' . $localname;
 185                unlink ($filename);
 186                unlink ("$filename.info");
 187             }
 188          }
 189       }
 190    }
 191
 192    // Return a nice MIME-boundary
 193    function mimeBoundary () {
 194       static $mimeBoundaryString;
 195
 196       if ($mimeBoundaryString == "") {
 197          $mimeBoundaryString = "----=_" .
 198              GenerateRandomString(60, '\'()+,-./:=?_', 7);
 199       }
 200
 201       return $mimeBoundaryString;
 202    }
 203
 204    /* Time offset for correct timezone */
 205    function timezone () {
 206       global $invert_time;
 207
 208       $diff_second = date('Z');
 209       if ($invert_time)
 210           $diff_second = - $diff_second;
 211       if ($diff_second > 0)
 212          $sign = '+';
 213       else
 214          $sign = '-';
 215
 216       $diff_second = abs($diff_second);
 217
 218       $diff_hour = floor ($diff_second / 3600);
 219       $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 220
 221       $zonename = '('.strftime('%Z').')';
 222       $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
 223       return ($result);
 224    }
 225
 226    /* Print all the needed RFC822 headers */
 227    function write822Header ($fp, $t, $c, $b, $subject, $more_headers) {
 228       global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 229       global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 230       global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 231       global $REMOTE_HOST, $identity;
 232
 233       // Storing the header to make sure the header is the same
 234       // everytime the header is printed.
 235       static $header, $headerlength;
 236
 237       if ($header == '') {
 238          $to = expandAddrs(parseAddrs($t));
 239          $cc = expandAddrs(parseAddrs($c));
 240          $bcc = expandAddrs(parseAddrs($b));
 241          if (isset($identity) && $identity != 'default')
 242          {
 243             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 244             $from = getPref($data_dir, $username, 'full_name' . $identity);
 245             $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 246          }
 247          else
 248          {
 249             $reply_to = getPref($data_dir, $username, 'reply_to');
 250             $from = getPref($data_dir, $username, 'full_name');
 251             $from_addr = getPref($data_dir, $username, 'email_address');
 252          }
 253
 254          if ($from_addr == '')
 255             $from_addr = $popuser.'@'.$domain;
 256
 257          $to_list = getLineOfAddrs($to);
 258          $cc_list = getLineOfAddrs($cc);
 259          $bcc_list = getLineOfAddrs($bcc);
 260
 261          /* Encoding 8-bit characters and making from line */
 262          $subject = encodeHeader($subject);
 263          if ($from == '')
 264             $from = "<$from_addr>";
 265          else
 266             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 267
 268          /* This creates an RFC 822 date */
 269          $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 270
 271          /* Create a message-id */
 272          $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 273          $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 274
 275          /* Make an RFC822 Received: line */
 276          if (isset($REMOTE_HOST))
 277             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 278          else
 279             $received_from = $REMOTE_ADDR;
 280
 281          if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 282             if ($HTTP_X_FORWARDED_FOR == '')
 283                $HTTP_X_FORWARDED_FOR = 'unknown';
 284             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 285          }
 286
 287          $header  = "Received: from $received_from\r\n";
 288          $header .= "        (SquirrelMail authenticated user $username)\r\n";
 289          $header .= "        by $SERVER_NAME with HTTP;\r\n";
 290          $header .= "        $date\r\n";
 291
 292          /* Insert the rest of the header fields */
 293          $header .= "Message-ID: $message_id\r\n";
 294          $header .= "Date: $date\r\n";
 295          $header .= "Subject: $subject\r\n";
 296          $header .= "From: $from\r\n";
 297          $header .= "To: $to_list\r\n";    // Who it's TO
 298
 299          /* Insert headers from the $more_headers array */
 300          if(is_array($more_headers)) {
 301             reset($more_headers);
 302             while(list($h_name, $h_val) = each($more_headers)) {
 303                $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 304             }
 305          }
 306
 307          if ($cc_list) {
 308             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 309          }
 310
 311          if ($reply_to != '')
 312             $header .= "Reply-To: $reply_to\r\n";
 313
 314          if ($useSendmail) {
 315             if ($bcc_list) {
 316                // BCCs is removed from header by sendmail
 317                $header .= "Bcc: $bcc_list\r\n";
 318             }
 319          }
 320
 321          $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; // Identify SquirrelMail
 322
 323          // Do the MIME-stuff
 324          $header .= "MIME-Version: 1.0\r\n";
 325
 326          if (isMultipart()) {
 327             $header .= 'Content-Type: multipart/mixed; boundary="';
 328             $header .= mimeBoundary();
 329             $header .= "\"\r\n";
 330          } else {
 331             if ($default_charset != '')
 332                $header .= "Content-Type: text/plain; charset=$default_charset\r\n";
 333             else
 334                $header .= "Content-Type: text/plain;\r\n";
 335             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 336          }
 337          $header .= "\r\n"; // One blank line to separate header and body
 338
 339          $headerlength = strlen($header);
 340       }
 341
 342       // Write the header
 343       fputs ($fp, $header);
 344
 345       return $headerlength;
 346    }
 347
 348    // Send the body
 349    function writeBody ($fp, $passedBody) {
 350       global $default_charset;
 351
 352       $attachmentlength = 0;
 353
 354       if (isMultipart()) {
 355          $body = '--'.mimeBoundary()."\r\n";
 356
 357          if ($default_charset != "")
 358             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 359          else
 360             $body .= "Content-Type: text/plain\r\n";
 361
 362          $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 363          $body .= $passedBody . "\r\n\r\n";
 364          fputs ($fp, $body);
 365
 366          $attachmentlength = attachFiles($fp);
 367
 368          if (!isset($postbody)) $postbody = "";
 369          $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 370          fputs ($fp, $postbody);
 371       } else {
 372          $body = $passedBody . "\r\n";
 373          fputs ($fp, $body);
 374          $postbody = "\r\n";
 375          fputs ($fp, $postbody);
 376       }
 377
 378       return (strlen($body) + strlen($postbody) + $attachmentlength);
 379    }
 380
 381    // Send mail using the sendmail command
 382    function sendSendmail($t, $c, $b, $subject, $body, $more_headers) {
 383       global $sendmail_path, $popuser, $username, $domain;
 384
 385       // Build envelope sender address. Make sure it doesn't contain
 386       // spaces or other "weird" chars that would allow a user to
 387       // exploit the shell/pipe it is used in.
 388       $envelopefrom = "$popuser@$domain";
 389       $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 390       $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 391       $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 392
 393       // open pipe to sendmail or qmail-inject (qmail-inject doesn't accept -t param)
 394       if (strstr($sendmail_path, "qmail-inject")) {
 395          $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 396       } else {
 397          $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 398       }
 399
 400       $headerlength = write822Header ($fp, $t, $c, $b, $subject, $more_headers);
 401       $bodylength = writeBody($fp, $body);
 402
 403       pclose($fp);
 404
 405       return ($headerlength + $bodylength);
 406    }
 407
 408    function smtpReadData($smtpConnection) {
 409       $read = fgets($smtpConnection, 1024);
 410       $counter = 0;
 411       while ($read) {
 412          echo $read . '<BR>';
 413          $data[$counter] = $read;
 414          $read = fgets($smtpConnection, 1024);
 415          $counter++;
 416       }
 417    }
 418
 419    function sendSMTP($t, $c, $b, $subject, $body, $more_headers) {
 420       global $username, $popuser, $domain, $version, $smtpServerAddress,
 421          $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 422          $key, $onetimepad;
 423
 424       $to = expandRcptAddrs(parseAddrs($t));
 425       $cc = expandRcptAddrs(parseAddrs($c));
 426       $bcc = expandRcptAddrs(parseAddrs($b));
 427       if (isset($identity) && $identity != 'default')
 428          $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 429       else
 430          $from_addr = getPref($data_dir, $username, 'email_address');
 431
 432       if (!$from_addr)
 433          $from_addr = "$popuser@$domain";
 434
 435       $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 436       if (!$smtpConnection) {
 437          echo 'Error connecting to SMTP Server.<br>';
 438          echo "$errorNumber : $errorString<br>";
 439          exit;
 440       }
 441       $tmp = fgets($smtpConnection, 1024);
 442       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 443
 444       $to_list = getLineOfAddrs($to);
 445       $cc_list = getLineOfAddrs($cc);
 446
 447       /** Lets introduce ourselves */
 448       if (! isset ($use_authenticated_smtp) || $use_authenticated_smtp == false) {
 449          fputs($smtpConnection, "HELO $domain\r\n");
 450          $tmp = fgets($smtpConnection, 1024);
 451       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 452       } else {
 453          fputs($smtpConnection, "EHLO $domain\r\n");
 454          $tmp = fgets($smtpConnection, 1024);
 455          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 456
 457          fputs($smtpConnection, "AUTH LOGIN\r\n");
 458          $tmp = fgets($smtpConnection, 1024);
 459          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 460
 461          fputs($smtpConnection, base64_encode ($username) . "\r\n");
 462          $tmp = fgets($smtpConnection, 1024);
 463          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 464
 465          fputs($smtpConnection, base64_encode (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 466          $tmp = fgets($smtpConnection, 1024);
 467          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 468       }
 469
 470       /** Ok, who is sending the message? */
 471       fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 472       $tmp = fgets($smtpConnection, 1024);
 473       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 474
 475       /** send who the recipients are */
 476       for ($i = 0; $i < count($to); $i++) {
 477          fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 478          $tmp = fgets($smtpConnection, 1024);
 479          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 480       }
 481       for ($i = 0; $i < count($cc); $i++) {
 482          fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 483          $tmp = fgets($smtpConnection, 1024);
 484          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 485       }
 486       for ($i = 0; $i < count($bcc); $i++) {
 487          fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 488          $tmp = fgets($smtpConnection, 1024);
 489          if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 490       }
 491
 492       /** Lets start sending the actual message */
 493       fputs($smtpConnection, "DATA\r\n");
 494       $tmp = fgets($smtpConnection, 1024);
 495       if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 496
 497       // Send the message
 498       $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $more_headers);
 499       $bodylength = writeBody($smtpConnection, $body);
 500
 501       fputs($smtpConnection, ".\r\n"); // end the DATA part
 502       $tmp = fgets($smtpConnection, 1024);
 503       $num = errorCheck($tmp, $smtpConnection, true);
 504       if ($num != 250) {
 505          $tmp = nl2br(htmlspecialchars($tmp));
 506          displayPageHeader($color, 'None');
 507          include_once('../functions/display_messages.php');
 508          $msg  = "Message not sent!<br>\nReason given: $tmp";
 509          plain_error_message($msg, $color);
 510          return(0);
 511       }
 512
 513       fputs($smtpConnection, "QUIT\r\n"); // log off
 514
 515       fclose($smtpConnection);
 516
 517       return ($headerlength + $bodylength);
 518    }
 519
 520
 521    function errorCheck($line, $smtpConnection, $verbose = false) {
 522       global $color;
 523
 524       // Read new lines on a multiline response
 525       $lines = $line;
 526       while(ereg("^[0-9]+-", $line)) {
 527          $line = fgets($smtpConnection, 1024);
 528          $lines .= $line;
 529       }
 530
 531       // Status:  0 = fatal
 532       //          5 = ok
 533
 534       $err_num = substr($line, 0, strpos($line, " "));
 535       switch ($err_num) {
 536          case 500:   $message = 'Syntax error; command not recognized';
 537                      $status = 0;
 538                      break;
 539          case 501:   $message = 'Syntax error in parameters or arguments';
 540                      $status = 0;
 541                      break;
 542          case 502:   $message = 'Command not implemented';
 543                      $status = 0;
 544                      break;
 545          case 503:   $message = 'Bad sequence of commands';
 546                      $status = 0;
 547                      break;
 548          case 504:   $message = 'Command parameter not implemented';
 549                      $status = 0;
 550                      break;
 551
 552
 553          case 211:   $message = 'System status, or system help reply';
 554                      $status = 5;
 555                      break;
 556          case 214:   $message = 'Help message';
 557                      $status = 5;
 558                      break;
 559
 560
 561          case 220:   $message = 'Service ready';
 562                      $status = 5;
 563                      break;
 564          case 221:   $message = 'Service closing transmission channel';
 565                      $status = 5;
 566                      break;
 567          case 421:   $message = 'Service not available, closing chanel';
 568                      $status = 0;
 569                      break;
 570
 571          case 235:   return(5); break;
 572          case 250:   $message = 'Requested mail action okay, completed';
 573                      $status = 5;
 574                      break;
 575          case 251:   $message = 'User not local; will forward';
 576                      $status = 5;
 577                      break;
 578          case 334:   return(5); break;
 579          case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 580                      $status = 0;
 581                      break;
 582          case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 583                      $status = 0;
 584                      break;
 585          case 451:   $message = 'Requested action aborted:  error in processing';
 586                      $status = 0;
 587                      break;
 588          case 551:   $message = 'User not local; please try forwarding';
 589                      $status = 0;
 590                      break;
 591          case 452:   $message = 'Requested action not taken:  insufficient system storage';
 592                      $status = 0;
 593                      break;
 594          case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 595                      $status = 0;
 596                      break;
 597          case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 598                      $status = 0;
 599                      break;
 600          case 354:   $message = 'Start mail input; end with .';
 601                      $status = 5;
 602                      break;
 603          case 554:   $message = 'Transaction failed';
 604                      $status = 0;
 605                      break;
 606          default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 607                      $status = 0;
 608                      $error_num = '001';
 609                      break;
 610       }
 611
 612       if ($status == 0) {
 613          include_once('../functions/page_header.php');
 614          displayPageHeader($color, 'None');
 615          include_once('../functions/display_messages.php');
 616          $lines = nl2br(htmlspecialchars($lines));
 617                  $msg  = $message . "<br>\nServer replied: $lines";
 618                  plain_error_message($msg, $color);
 619       }
 620       if (! $verbose) return $status;
 621       return $err_num;
 622    }
 623
 624    function sendMessage($t, $c, $b, $subject, $body, $reply_id, $prio = 3) {
 625       global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad;
 626       global $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress, $imapPort;
 627       global $default_use_priority;
 628       global $more_headers;
 629       $more_headers = Array();
 630
 631       do_hook("smtp_send");
 632
 633       $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 634
 635       if (isset($reply_id) && $reply_id) {
 636          sqimap_mailbox_select ($imap_stream, $mailbox);
 637          sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 638
 639          // Insert In-Reply-To and References headers if the
 640          // message-id of the message we reply to is set (longer than "<>")
 641          // The References header should really be the old Referenced header
 642          // with the message ID appended, but it can be only the message ID too.
 643          $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 644          if(strlen($hdr->message_id) > 2) {
 645             $more_headers['In-Reply-To'] = $hdr->message_id;
 646             $more_headers['References']  = $hdr->message_id;
 647          }
 648       }
 649       if ($default_use_priority) {
 650         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 651       }
 652
 653       // In order to remove the problem of users not able to create
 654       // messages with "." on a blank line, RFC821 has made provision
 655       // in section 4.5.2 (Transparency).
 656       $body = ereg_replace("\n\\.", "\n..", $body);
 657       $body = ereg_replace("^\\.", "..", $body);
 658
 659       // this is to catch all plain \n instances and
 660       // replace them with \r\n.  All newlines were converted
 661       // into just \n inside the compose.php file.
 662       $body = ereg_replace("\n", "\r\n", $body);
 663
 664       if ($useSendmail) {
 665          $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers);
 666       } else {
 667          $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers);
 668       }
 669
 670       if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 671          sqimap_append ($imap_stream, $sent_folder, $length);
 672          write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers);
 673          writeBody ($imap_stream, $body);
 674          sqimap_append_done ($imap_stream);
 675       }
 676       sqimap_logout($imap_stream);
 677       // Delete the files uploaded for attaching (if any).
 678       // only if $length != 0 (if there was no error)
 679       if ($length)
 680          ClearAttachments();
 681
 682       return $length;
 683    }
 684
 685    function createPriorityHeaders($prio) {
 686      $prio_headers = Array();
 687      $prio_headers["X-Priority"] = $prio;
 688
 689      switch($prio) {
 690      case 1: $prio_headers["Importance"] = "High";
 691        $prio_headers["X-MSMail-Priority"] = "High";
 692        break;
 693
 694      case 3: $prio_headers["Importance"] = "Normal";
 695        $prio_headers["X-MSMail-Priority"] = "Normal";
 696        break;
 697
 698      case 5:
 699        $prio_headers["Importance"] = "Low";
 700        $prio_headers["X-MSMail-Priority"] = "Low";
 701        break;
 702      }
 703      return  $prio_headers;
 704    }
 705 ?>