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