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 $attachments;
  37     return true;
  38 /*
  39     if (count($attachments)>0) {
  40         for ($i=0 ; $i < count($attachments) ; $i++) {
  41             if ($attachments[$i]->session == $session) {
  42                 return true;
  43             }
  44         }
  45     } else {
  46         return false;
  47     }
  48 */
  49 }
  50
  51 /* looks up aliases in the addressbook and expands them to
  52  * the full address.
  53  *
  54  * Adds @$domain if it wasn't in the address book and if it
  55  * doesn't have an @ symbol in it
  56  */
  57 function expandAddrs ($array) {
  58     global $domain;
  59
  60     /* don't show errors -- kinda critical that we don't see
  61      * them here since the redirect won't work if we do show them
  62      */
  63     $abook = addressbook_init(false, true);
  64     for ($i=0; $i < count($array); $i++) {
  65         $result = $abook->lookup($array[$i]);
  66         $ret = "";
  67         if (isset($result['email'])) {
  68             if (isset($result['name'])) {
  69                 $ret = '"'.$result['name'].'" ';
  70             }
  71             $ret .= '<'.$result['email'].'>';
  72             $array[$i] = $ret;
  73         }
  74         else
  75         {
  76             if (strpos($array[$i], '@') === false) {
  77                 $array[$i] .= '@' . $domain;
  78             }
  79             $array[$i] = '<' . $array[$i] . '>';
  80         }
  81     }
  82     return $array;
  83 }
  84
  85
  86 /* looks up aliases in the addressbook and expands them to
  87  * the RFC 821 valid RCPT address. ie <user@example.com>
  88  * Adds @$domain if it wasn't in the address book and if it
  89  * doesn't have an @ symbol in it
  90  */
  91 function expandRcptAddrs ($array) {
  92     global $domain;
  93
  94     /* don't show errors -- kinda critical that we don't see
  95      * them here since the redirect won't work if we do show them
  96      */
  97     $abook = addressbook_init(false, true);
  98     for ($i=0; $i < count($array); $i++) {
  99         $result = $abook->lookup($array[$i]);
 100         $ret = "";
 101         if (isset($result['email'])) {
 102             $ret = '<'.$result['email'].'>';
 103             $array[$i] = $ret;
 104         }
 105         else {
 106             if (strpos($array[$i], '@') === false) {
 107                 $array[$i] .= '@' . $domain;
 108             }
 109             $array[$i] = '<' . $array[$i] . '>';
 110         }
 111     }
 112     return $array;
 113 }
 114
 115
 116 /* Attach the files that are due to be attached
 117  */
 118 function attachFiles ($fp, $session) {
 119     global $attachments, $attachment_dir, $username;
 120
 121     $length = 0;
 122
 123     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 124     if (isMultipart($session)) {
 125         foreach ($attachments as $info) {
 126           if ($info['session'] == $session) {
 127             if (isset($info['type'])) {
 128                 $filetype = $info['type'];
 129             }
 130             else {
 131                 $filetype = 'application/octet-stream';
 132             }
 133
 134             $header = '--' . mimeBoundary() . "\r\n";
 135             if ( isset($info['remotefilename']) && $info['remotefilename'] != '') {
 136                 $header .= "Content-Type: $filetype; name=\"" .
 137                     $info['remotefilename'] . "\"\r\n";
 138                 $header .= "Content-Disposition: attachment; filename=\"" .
 139                     $info['remotefilename'] . "\"\r\n";
 140             } else {
 141                 $header .= "Content-Type: $filetype;\r\n";
 142             }
 143
 144
 145             /* Use 'rb' for NT systems -- read binary
 146              * Unix doesn't care -- everything's binary!  :-)
 147              */
 148
 149             $filename = $hashed_attachment_dir . '/' . $info['localfilename'];
 150             $file = fopen ($filename, 'rb');
 151             if (substr($filetype, 0, 5) == 'text/' ||
 152                 substr($filetype, 0, 8) == 'message/' ) {
 153                 $header .= "\r\n";
 154                 fputs ($fp, $header);
 155                 $length += strlen($header);
 156                 while ($tmp = fgets($file, 4096)) {
 157                     $tmp = str_replace("\r\n", "\n", $tmp);
 158                     $tmp = str_replace("\r", "\n", $tmp);
 159                     $tmp = str_replace("\n", "\r\n", $tmp);
 160                     if (feof($fp) && substr($tmp, -2) != "\r\n") {
 161                         $tmp .= "\r\n";
 162                     }
 163                     fputs($fp, $tmp);
 164                     $length += strlen($tmp);
 165                 }
 166             } else {
 167                 $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
 168                 fputs ($fp, $header);
 169                 $length += strlen($header);
 170                 while ($tmp = fread($file, 570)) {
 171                     $encoded = chunk_split(base64_encode($tmp));
 172                     $length += strlen($encoded);
 173                     fputs ($fp, $encoded);
 174                 }
 175             }
 176             fclose ($file);
 177           }
 178         }
 179     }
 180     return $length;
 181 }
 182
 183 /* Delete files that are uploaded for attaching
 184  */
 185 function deleteAttachments($session) {
 186     global $username, $attachments, $attachment_dir;
 187     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 188
 189     $rem_attachments = array();
 190     foreach ($attachments as $info) {
 191         if ($info['session'] == $session) {
 192             $attached_file = "$hashed_attachment_dir/$info[localfilename]";
 193             if (file_exists($attached_file)) {
 194                 unlink($attached_file);
 195             }
 196         } else {
 197             $rem_attachments[] = $info;
 198         }
 199     }
 200     $attachments = $rem_attachments;
 201 }
 202
 203
 204
 205
 206 //    $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 207 //    if (isMultipart($ses)) {
 208 //        reset($attachments);
 209 //        while (list($localname, $remotename, $session) = each($attachments)) {
 210 //        if ($session == $ses) {
 211 ///            if (!ereg ("\\/", $localname)) {
 212 //                $filename = $hashed_attachment_dir . '/' . $localname;
 213 //                unlink ($filename);
 214 //                unlink ("$filename.info");
 215 //            }
 216 //        }
 217 //        }
 218 //    }
 219 //}
 220
 221 /* Return a nice MIME-boundary
 222  */
 223 function mimeBoundary () {
 224     static $mimeBoundaryString;
 225
 226     if ( !isset( $mimeBoundaryString ) ||
 227          $mimeBoundaryString == '') {
 228         $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
 229                               mt_rand( 10000, 99999 );
 230     }
 231
 232     return $mimeBoundaryString;
 233 }
 234
 235 /* Time offset for correct timezone */
 236 function timezone () {
 237     global $invert_time;
 238
 239     $diff_second = date('Z');
 240     if ($invert_time) {
 241         $diff_second = - $diff_second;
 242     }
 243     if ($diff_second > 0) {
 244         $sign = '+';
 245     }
 246     else {
 247         $sign = '-';
 248     }
 249
 250     $diff_second = abs($diff_second);
 251
 252     $diff_hour = floor ($diff_second / 3600);
 253     $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 254
 255     $zonename = '('.strftime('%Z').')';
 256     $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
 257     return ($result);
 258 }
 259
 260 /* Print all the needed RFC822 headers */
 261 function write822Header ($fp, $t, $c, $b, $subject, $more_headers, $session) {
 262     global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 263     global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 264     global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 265     global $REMOTE_HOST, $identity;
 266
 267     /* Storing the header to make sure the header is the same
 268      * everytime the header is printed.
 269      */
 270     static $header, $headerlength;
 271
 272     if ($header == '') {
 273         $to = expandAddrs(parseAddrs($t));
 274         $cc = expandAddrs(parseAddrs($c));
 275         $bcc = expandAddrs(parseAddrs($b));
 276         if (isset($identity) && $identity != 'default') {
 277             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 278             $from = getPref($data_dir, $username, 'full_name' . $identity);
 279             $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 280         } else {
 281             $reply_to = getPref($data_dir, $username, 'reply_to');
 282             $from = getPref($data_dir, $username, 'full_name');
 283             $from_addr = getPref($data_dir, $username, 'email_address');
 284         }
 285
 286         if ($from_addr == '') {
 287             $from_addr = $popuser.'@'.$domain;
 288         }
 289
 290         $to_list = getLineOfAddrs($to);
 291         $cc_list = getLineOfAddrs($cc);
 292         $bcc_list = getLineOfAddrs($bcc);
 293
 294         /* Encoding 8-bit characters and making from line */
 295         $subject = encodeHeader($subject);
 296         if ($from == '') {
 297             $from = "<$from_addr>";
 298         }
 299         else {
 300             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 301         }
 302
 303         /* This creates an RFC 822 date */
 304         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 305
 306         /* Create a message-id */
 307         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 308         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 309
 310         /* Make an RFC822 Received: line */
 311         if (isset($REMOTE_HOST)) {
 312             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 313         }
 314         else {
 315             $received_from = $REMOTE_ADDR;
 316         }
 317
 318         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 319             if ($HTTP_X_FORWARDED_FOR == '') {
 320                 $HTTP_X_FORWARDED_FOR = 'unknown';
 321             }
 322             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 323         }
 324
 325         $header  = "Received: from $received_from\r\n";
 326         $header .= "        (SquirrelMail authenticated user $username)\r\n";
 327         $header .= "        by $SERVER_NAME with HTTP;\r\n";
 328         $header .= "        $date\r\n";
 329
 330         /* Insert the rest of the header fields */
 331         $header .= "Message-ID: $message_id\r\n";
 332         $header .= "Date: $date\r\n";
 333         $header .= "Subject: $subject\r\n";
 334         $header .= "From: $from\r\n";
 335         $header .= "To: $to_list\r\n";    // Who it's TO
 336
 337         if (isset($more_headers["Content-Type"])) {
 338             $contentType = $more_headers["Content-Type"];
 339             unset($more_headers["Content-Type"]);
 340         }
 341         else {
 342             if (isMultipart($session)) {
 343                 $contentType = "multipart/mixed;";
 344             }
 345             else {
 346                 if ($default_charset != '') {
 347                     $contentType = 'text/plain; charset='.$default_charset;
 348                 }
 349                 else {
 350                     $contentType = 'text/plain;';
 351                 }
 352             }
 353         }
 354
 355         /* Insert headers from the $more_headers array */
 356         if(is_array($more_headers)) {
 357             reset($more_headers);
 358             while(list($h_name, $h_val) = each($more_headers)) {
 359                 $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 360             }
 361         }
 362
 363         if ($cc_list) {
 364             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 365         }
 366
 367         if ($reply_to != '') {
 368             $header .= "Reply-To: $reply_to\r\n";
 369         }
 370
 371         if ($useSendmail) {
 372             if ($bcc_list) {
 373                 // BCCs is removed from header by sendmail
 374                 $header .= "Bcc: $bcc_list\r\n";
 375             }
 376         }
 377
 378         $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; /* Identify SquirrelMail */
 379
 380         /* Do the MIME-stuff */
 381         $header .= "MIME-Version: 1.0\r\n";
 382
 383         if (isMultipart($session)) {
 384             $header .= 'Content-Type: '.$contentType.' boundary="';
 385             $header .= mimeBoundary();
 386             $header .= "\"\r\n";
 387         } else {
 388             $header .= 'Content-Type: '.$contentType."\r\n";
 389             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 390         }
 391         $header .= "\r\n"; // One blank line to separate header and body
 392
 393         $headerlength = strlen($header);
 394     }
 395
 396     /* Write the header */
 397     fputs ($fp, $header);
 398
 399     return $headerlength;
 400 }
 401
 402 /* Send the body
 403  */
 404 function writeBody ($fp, $passedBody, $session) {
 405     global $default_charset;
 406
 407     $attachmentlength = 0;
 408
 409     if (isMultipart($session)) {
 410         $body = '--'.mimeBoundary()."\r\n";
 411
 412         if ($default_charset != "") {
 413             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 414         }
 415         else {
 416             $body .= "Content-Type: text/plain\r\n";
 417         }
 418
 419         $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 420         $body .= $passedBody . "\r\n\r\n";
 421         fputs ($fp, $body);
 422
 423         $attachmentlength = attachFiles($fp, $session);
 424
 425         if (!isset($postbody)) {
 426             $postbody = "";
 427         }
 428         $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 429         fputs ($fp, $postbody);
 430     } else {
 431         $body = $passedBody . "\r\n";
 432         fputs ($fp, $body);
 433         $postbody = "\r\n";
 434         fputs ($fp, $postbody);
 435     }
 436
 437     return (strlen($body) + strlen($postbody) + $attachmentlength);
 438 }
 439
 440 /* Send mail using the sendmail command
 441  */
 442 function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) {
 443     global $sendmail_path, $popuser, $username, $domain;
 444
 445     /* Build envelope sender address. Make sure it doesn't contain
 446      * spaces or other "weird" chars that would allow a user to
 447      * exploit the shell/pipe it is used in.
 448      */
 449     $envelopefrom = "$popuser@$domain";
 450     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 451     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 452     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 453
 454     /* open pipe to sendmail or qmail-inject (qmail-inject doesn't accept -t param) */
 455     if (strstr($sendmail_path, "qmail-inject")) {
 456         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 457     } else {
 458         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 459     }
 460
 461     $headerlength = write822Header ($fp, $t, $c, $b, $subject, $more_headers, $session);
 462     $bodylength = writeBody($fp, $body, $session);
 463
 464     pclose($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, 'email_address' . $identity);
 490     }
 491     else {
 492         $from_addr = getPref($data_dir, $username, 'email_address');
 493     }
 494
 495     if (!$from_addr) {
 496         $from_addr = "$popuser@$domain";
 497     }
 498
 499     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 500     if (!$smtpConnection) {
 501         echo 'Error connecting to SMTP Server.<br>';
 502         echo "$errorNumber : $errorString<br>";
 503         exit;
 504     }
 505     $tmp = fgets($smtpConnection, 1024);
 506     if (errorCheck($tmp, $smtpConnection)!=5) {
 507         return(0);
 508     }
 509
 510     $to_list = getLineOfAddrs($to);
 511     $cc_list = getLineOfAddrs($cc);
 512
 513     /* Lets introduce ourselves */
 514     if (! isset ($use_authenticated_smtp) || $use_authenticated_smtp == false) {
 515         fputs($smtpConnection, "HELO $domain\r\n");
 516         $tmp = fgets($smtpConnection, 1024);
 517         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 518     } else {
 519         fputs($smtpConnection, "EHLO $domain\r\n");
 520         $tmp = fgets($smtpConnection, 1024);
 521         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 522
 523         fputs($smtpConnection, "AUTH LOGIN\r\n");
 524         $tmp = fgets($smtpConnection, 1024);
 525         if (errorCheck($tmp, $smtpConnection)!=5) {
 526             return(0);
 527         }
 528
 529         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 530         $tmp = fgets($smtpConnection, 1024);
 531         if (errorCheck($tmp, $smtpConnection)!=5) {
 532             return(0);
 533         }
 534
 535         fputs($smtpConnection, base64_encode (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 536         $tmp = fgets($smtpConnection, 1024);
 537         if (errorCheck($tmp, $smtpConnection)!=5) {
 538             return(0);
 539         }
 540     }
 541
 542     /* Ok, who is sending the message? */
 543     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 544     $tmp = fgets($smtpConnection, 1024);
 545     if (errorCheck($tmp, $smtpConnection)!=5) {
 546         return(0);
 547     }
 548
 549     /* send who the recipients are */
 550     for ($i = 0; $i < count($to); $i++) {
 551         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 552         $tmp = fgets($smtpConnection, 1024);
 553         if (errorCheck($tmp, $smtpConnection)!=5) {
 554             return(0);
 555         }
 556     }
 557     for ($i = 0; $i < count($cc); $i++) {
 558         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 559         $tmp = fgets($smtpConnection, 1024);
 560         if (errorCheck($tmp, $smtpConnection)!=5) {
 561             return(0);
 562         }
 563     }
 564     for ($i = 0; $i < count($bcc); $i++) {
 565         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 566         $tmp = fgets($smtpConnection, 1024);
 567         if (errorCheck($tmp, $smtpConnection)!=5) {
 568             return(0);
 569         }
 570     }
 571
 572     /* Lets start sending the actual message */
 573     fputs($smtpConnection, "DATA\r\n");
 574     $tmp = fgets($smtpConnection, 1024);
 575     if (errorCheck($tmp, $smtpConnection)!=5) {
 576         return(0);
 577     }
 578
 579     /* Send the message */
 580     $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $more_headers, $session);
 581     $bodylength = writeBody($smtpConnection, $body, $session);
 582
 583     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 584     $tmp = fgets($smtpConnection, 1024);
 585     $num = errorCheck($tmp, $smtpConnection, true);
 586     if ($num != 250) {
 587         return(0);
 588     }
 589
 590     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 591
 592     fclose($smtpConnection);
 593
 594     return ($headerlength + $bodylength);
 595 }
 596
 597
 598 function errorCheck($line, $smtpConnection, $verbose = false) {
 599     global $color, $compose_new_win;
 600
 601     /* Read new lines on a multiline response */
 602     $lines = $line;
 603     while(ereg("^[0-9]+-", $line)) {
 604         $line = fgets($smtpConnection, 1024);
 605         $lines .= $line;
 606     }
 607
 608     /* Status:  0 = fatal
 609      *          5 = ok
 610      */
 611     $err_num = substr($line, 0, strpos($line, " "));
 612     switch ($err_num) {
 613     case 500:   $message = 'Syntax error; command not recognized';
 614         $status = 0;
 615         break;
 616     case 501:   $message = 'Syntax error in parameters or arguments';
 617         $status = 0;
 618         break;
 619     case 502:   $message = 'Command not implemented';
 620         $status = 0;
 621         break;
 622     case 503:   $message = 'Bad sequence of commands';
 623         $status = 0;
 624         break;
 625     case 504:   $message = 'Command parameter not implemented';
 626         $status = 0;
 627         break;
 628
 629     case 211:   $message = 'System status, or system help reply';
 630         $status = 5;
 631         break;
 632     case 214:   $message = 'Help message';
 633         $status = 5;
 634         break;
 635
 636     case 220:   $message = 'Service ready';
 637         $status = 5;
 638         break;
 639     case 221:   $message = 'Service closing transmission channel';
 640         $status = 5;
 641         break;
 642
 643     case 421:   $message = 'Service not available, closing chanel';
 644         $status = 0;
 645         break;
 646
 647     case 235:   return(5);
 648         break;
 649     case 250:   $message = 'Requested mail action okay, completed';
 650         $status = 5;
 651         break;
 652     case 251:   $message = 'User not local; will forward';
 653         $status = 5;
 654         break;
 655     case 334:   return(5); break;
 656     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 657         $status = 0;
 658         break;
 659     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 660         $status = 0;
 661         break;
 662     case 451:   $message = 'Requested action aborted:  error in processing';
 663         $status = 0;
 664         break;
 665     case 551:   $message = 'User not local; please try forwarding';
 666         $status = 0;
 667         break;
 668     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 669         $status = 0;
 670         break;
 671     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 672         $status = 0;
 673         break;
 674     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 675         $status = 0;
 676         break;
 677     case 354:   $message = 'Start mail input; end with .';
 678         $status = 5;
 679         break;
 680     case 554:   $message = 'Transaction failed';
 681         $status = 0;
 682         break;
 683     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 684         $status = 0;
 685         $error_num = '001';
 686         break;
 687     }
 688
 689     if ($status == 0) {
 690         include_once('../functions/page_header.php');
 691         if ($compose_new_win == '1') {
 692             compose_Header($color, 'None');
 693         }
 694         else {
 695             displayPageHeader($color, 'None');
 696         }
 697         include_once('../functions/display_messages.php');
 698         $lines = nl2br(htmlspecialchars($lines));
 699         $msg  = $message . "<br>\nServer replied: $lines";
 700         plain_error_message($msg, $color);
 701     }
 702     if (! $verbose) return $status;
 703     return $err_num;
 704 }
 705
 706 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN, $prio = 3, $session) {
 707     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 708            $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress,
 709            $imapPort, $default_use_priority, $more_headers, $request_mdn, $request_dr;
 710
 711     $more_headers = Array();
 712
 713     do_hook('smtp_send');
 714
 715     $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 716
 717     if (isset($reply_id) && $reply_id) {
 718         sqimap_mailbox_select ($imap_stream, $mailbox);
 719         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 720
 721         /* Insert In-Reply-To and References headers if the
 722          * message-id of the message we reply to is set (longer than "<>")
 723          * The References header should really be the old Referenced header
 724          * with the message ID appended, but it can be only the message ID too.
 725          */
 726         $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 727         if(strlen($hdr->message_id) > 2) {
 728             $more_headers['In-Reply-To'] = $hdr->message_id;
 729             $more_headers['References']  = $hdr->message_id;
 730         }
 731     }
 732     if ($default_use_priority) {
 733         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 734     }
 735
 736     $requestRecipt = 0;
 737     if (isset($request_dr)) {
 738         $requestRecipt += 1;
 739     }
 740     if (isset($request_mdn)) {
 741         $requestRecipt += 2;
 742     }
 743     if ( $requestRecipt > 0) {
 744         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 745     }
 746
 747     /* In order to remove the problem of users not able to create
 748      * messages with "." on a blank line, RFC821 has made provision
 749      * in section 4.5.2 (Transparency).
 750      */
 751     $body = ereg_replace("\n\\.", "\n..", $body);
 752     $body = ereg_replace("^\\.", "..", $body);
 753
 754     /* this is to catch all plain \n instances and
 755      * replace them with \r\n.  All newlines were converted
 756      * into just \n inside the compose.php file.
 757      */
 758     $body = ereg_replace("\n", "\r\n", $body);
 759
 760     if ($MDN) {
 761         $more_headers["Content-Type"] = "multipart/report; ".
 762             "report-type=disposition-notification;";
 763     }
 764
 765     if ($useSendmail) {
 766         $length = sendSendmail($t, $c, $b, $subject, $body,  $more_headers, $session);
 767     } else {
 768         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session);
 769     }
 770     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 771         sqimap_append ($imap_stream, $sent_folder, $length);
 772         write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers, $session);
 773         writeBody ($imap_stream, $body, $session);
 774         sqimap_append_done ($imap_stream);
 775     }
 776     sqimap_logout($imap_stream);
 777     /* Delete the files uploaded for attaching (if any).
 778      * only if $length != 0 (if there was no error)
 779      */
 780     if ($length) {
 781         ClearAttachments($session);
 782     }
 783
 784     return $length;
 785 }
 786
 787 function createPriorityHeaders($prio) {
 788     $prio_headers = Array();
 789     $prio_headers['X-Priority'] = $prio;
 790
 791     switch($prio) {
 792     case 1: $prio_headers['Importance'] = 'High';
 793         $prio_headers['X-MSMail-Priority'] = 'High';
 794         break;
 795
 796     case 3: $prio_headers['Importance'] = 'Normal';
 797         $prio_headers['X-MSMail-Priority'] = 'Normal';
 798         break;
 799
 800     case 5:
 801         $prio_headers['Importance'] = 'Low';
 802         $prio_headers['X-MSMail-Priority'] = 'Low';
 803         break;
 804     }
 805     return  $prio_headers;
 806 }
 807
 808 function createReceiptHeaders($receipt) {
 809
 810     GLOBAL $data_dir, $username;
 811
 812     $receipt_headers = Array();
 813     $from_addr = getPref($data_dir, $username, 'email_address');
 814     $from = getPref($data_dir, $username, 'full_name');
 815
 816     if ($from == '') {
 817         $from = "<$from_addr>";
 818     }
 819     else {
 820         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 821     }
 822
 823     /* On Delivery */
 824     if ( $receipt == 1
 825         || $receipt == 3 ) {
 826         $receipt_headers["Return-Receipt-To"] = $from;
 827     }
 828     /* On Read */
 829     if ($receipt == 2
 830         || $receipt == 3 ) {
 831         /* Pegasus Mail */
 832         $receipt_headers["X-Confirm-Reading-To"] = $from;
 833         /* RFC 2298 */
 834         $receipt_headers["Disposition-Notification-To"] = $from;
 835     }
 836     return $receipt_headers;
 837 }
 838
 839
 840 ?>