functions/smtp.php

   1 <?php
   2
   3 /**
   4  * smtp.php
   5  *
   6  * Copyright (c) 1999-2002 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This contains all the functions needed to send messages through
  10  * an smtp server or sendmail.
  11  *
  12  * $Id$
  13  */
  14
  15 require_once('../functions/addressbook.php');
  16 require_once('../functions/plugin.php');
  17 require_once('../functions/prefs.php');
  18
  19 global $username, $popuser, $domain;
  20
  21 /* This should most probably go to some initialization... */
  22 if (ereg("^([^@%/]+)[@%/](.+)$", $username, $usernamedata)) {
  23     $popuser = $usernamedata[1];
  24     $domain  = $usernamedata[2];
  25     unset($usernamedata);
  26 } else {
  27     $popuser = $username;
  28 }
  29 /* We need domain for smtp */
  30 if (!$domain) {
  31     $domain = getenv('HOSTNAME');
  32 }
  33
  34 /* Returns true only if this message is multipart */
  35 function isMultipart ($session) {
  36     global $attachments;
  37
  38     foreach ($attachments as $info) {
  39         if ($info['session'] == $session) {
  40             return true;
  41         }
  42     }
  43     return false;
  44 }
  45
  46 /* looks up aliases in the addressbook and expands them to
  47  * the full address.
  48  *
  49  * Adds @$domain if it wasn't in the address book and if it
  50  * doesn't have an @ symbol in it
  51  */
  52 function expandAddrs ($array) {
  53     global $domain;
  54
  55     /* don't show errors -- kinda critical that we don't see
  56      * them here since the redirect won't work if we do show them
  57      */
  58     $abook = addressbook_init(false, true);
  59     for ($i=0; $i < count($array); $i++) {
  60         $result = $abook->lookup($array[$i]);
  61         $ret = "";
  62         if (isset($result['email'])) {
  63             if (isset($result['name'])) {
  64                 $ret = '"'.$result['name'].'" ';
  65             }
  66             $ret .= '<'.$result['email'].'>';
  67             $array[$i] = $ret;
  68         }
  69         else
  70         {
  71             if (strpos($array[$i], '@') === false) {
  72                 $array[$i] .= '@' . $domain;
  73             }
  74             $array[$i] = '<' . $array[$i] . '>';
  75         }
  76     }
  77     return $array;
  78 }
  79
  80
  81 /* looks up aliases in the addressbook and expands them to
  82  * the RFC 821 valid RCPT address. ie <user@example.com>
  83  * Adds @$domain if it wasn't in the address book and if it
  84  * doesn't have an @ symbol in it
  85  */
  86 function expandRcptAddrs ($array) {
  87     global $domain;
  88
  89     /* don't show errors -- kinda critical that we don't see
  90      * them here since the redirect won't work if we do show them
  91      */
  92     $abook = addressbook_init(false, true);
  93     for ($i=0; $i < count($array); $i++) {
  94         $result = $abook->lookup($array[$i]);
  95         $ret = "";
  96         if (isset($result['email'])) {
  97             $ret = '<'.$result['email'].'>';
  98             $array[$i] = $ret;
  99         }
 100         else {
 101             if (strpos($array[$i], '@') === false) {
 102                 $array[$i] .= '@' . $domain;
 103             }
 104             $array[$i] = '<' . $array[$i] . '>';
 105         }
 106     }
 107     return $array;
 108 }
 109
 110
 111 /* Attach the files that are due to be attached
 112  */
 113 function attachFiles ($fp, $session, $rn="\r\n") {
 114     global $attachments, $attachment_dir, $username;
 115
 116     $length = 0;
 117
 118     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 119     if (isMultipart($session)) {
 120         foreach ($attachments as $info) {
 121             if ($info['session'] == $session) {
 122                 if (isset($info['type'])) {
 123                     $filetype = $info['type'];
 124                 }
 125                 else {
 126                     $filetype = 'application/octet-stream';
 127                 }
 128
 129                 $header = '--' . mimeBoundary() . "$rn";
 130                 if ( isset($info['remotefilename'])
 131                      && $info['remotefilename'] != '') {
 132                     $header .= "Content-Type: $filetype; name=\"" .
 133                         $info['remotefilename'] . "\"$rn";
 134                     $header .= "Content-Disposition: attachment; filename=\""
 135                         . $info['remotefilename'] . "\"$rn";
 136                 } else {
 137                     $header .= "Content-Type: $filetype$rn";
 138                 }
 139
 140
 141                 /* Use 'rb' for NT systems -- read binary
 142                  * Unix doesn't care -- everything's binary!  :-)
 143                  */
 144
 145                 $filename = $hashed_attachment_dir . '/'
 146                     . $info['localfilename'];
 147                 $file = fopen ($filename, 'rb');
 148                 if (substr($filetype, 0, 5) == 'text/' ||
 149                     substr($filetype, 0, 8) == 'message/' ) {
 150                     $header .= "$rn";
 151                     fputs ($fp, $header);
 152                     $length += strlen($header);
 153                     while ($tmp = fgets($file, 4096)) {
 154                         $tmp = str_replace("\r\n", "\n", $tmp);
 155                         $tmp = str_replace("\r", "\n", $tmp);
 156                         if ($rn == "\r\n"){
 157                             $tmp = str_replace("\n", "\r\n", $tmp);
 158                         }
 159                         /**
 160                          * Check if the last line has newline ($rn) in it
 161                          * and append if it doesn't.
 162                          */
 163                         if (feof($fp) && !strstr($tmp, "$rn")){
 164                             $tmp .= "$rn";
 165                         }
 166                         fputs($fp, $tmp);
 167                         $length += strlen($tmp);
 168                     }
 169                 } else {
 170                     $header .= "Content-Transfer-Encoding: base64"
 171                         . "$rn" . "$rn";
 172                     fputs ($fp, $header);
 173                     $length += strlen($header);
 174                     while ($tmp = fread($file, 570)) {
 175                         $encoded = chunk_split(base64_encode($tmp));
 176                         $length += strlen($encoded);
 177                         fputs ($fp, $encoded);
 178                     }
 179                 }
 180                 fclose ($file);
 181             }
 182         }
 183     }
 184     return $length;
 185 }
 186
 187 /* Delete files that are uploaded for attaching
 188  */
 189 function deleteAttachments($session) {
 190     global $username, $attachments, $attachment_dir;
 191     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 192
 193     $rem_attachments = array();
 194     foreach ($attachments as $info) {
 195         if ($info['session'] == $session) {
 196             $attached_file = "$hashed_attachment_dir/$info[localfilename]";
 197             if (file_exists($attached_file)) {
 198                 unlink($attached_file);
 199             }
 200         } else {
 201             $rem_attachments[] = $info;
 202         }
 203     }
 204     $attachments = $rem_attachments;
 205 }
 206
 207 /* Return a nice MIME-boundary
 208  */
 209 function mimeBoundary () {
 210     static $mimeBoundaryString;
 211
 212     if ( !isset( $mimeBoundaryString ) ||
 213          $mimeBoundaryString == '') {
 214         $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
 215             mt_rand( 10000, 99999 );
 216     }
 217
 218     return $mimeBoundaryString;
 219 }
 220
 221 /* Time offset for correct timezone */
 222 function timezone () {
 223     global $invert_time;
 224
 225     $diff_second = date('Z');
 226     if ($invert_time) {
 227         $diff_second = - $diff_second;
 228     }
 229     if ($diff_second > 0) {
 230         $sign = '+';
 231     }
 232     else {
 233         $sign = '-';
 234     }
 235
 236     $diff_second = abs($diff_second);
 237
 238     $diff_hour = floor ($diff_second / 3600);
 239     $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 240
 241     $zonename = '('.strftime('%Z').')';
 242     $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
 243                        $zonename);
 244     return ($result);
 245 }
 246
 247 /* Print all the needed RFC822 headers */
 248 function write822Header ($fp, $t, $c, $b, $subject, $more_headers, $session, $rn="\r\n") {
 249     global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 250     global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 251     global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 252     global $REMOTE_HOST, $identity;
 253
 254     /* Storing the header to make sure the header is the same
 255      * everytime the header is printed.
 256      */
 257     static $header, $headerlength;
 258
 259     if ($header == '') {
 260         $to = expandAddrs(parseAddrs($t));
 261         $cc = expandAddrs(parseAddrs($c));
 262         $bcc = expandAddrs(parseAddrs($b));
 263         if (isset($identity) && $identity != 'default') {
 264             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 265             $from = getPref($data_dir, $username, 'full_name' . $identity);
 266             $from_addr = getPref($data_dir, $username,
 267                                  'email_address' . $identity);
 268         } else {
 269             $reply_to = getPref($data_dir, $username, 'reply_to');
 270             $from = getPref($data_dir, $username, 'full_name');
 271             $from_addr = getPref($data_dir, $username, 'email_address');
 272         }
 273
 274         if ($from_addr == '') {
 275             $from_addr = $popuser.'@'.$domain;
 276         }
 277
 278         $to_list = getLineOfAddrs($to);
 279         $cc_list = getLineOfAddrs($cc);
 280         $bcc_list = getLineOfAddrs($bcc);
 281
 282         /* Encoding 8-bit characters and making from line */
 283         $subject = encodeHeader($subject);
 284         if ($from == '') {
 285             $from = "<$from_addr>";
 286         }
 287         else {
 288             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 289         }
 290
 291         /* This creates an RFC 822 date */
 292         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 293
 294         /* Create a message-id */
 295         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 296         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 297
 298         /* Make an RFC822 Received: line */
 299         if (isset($REMOTE_HOST)) {
 300             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 301         }
 302         else {
 303             $received_from = $REMOTE_ADDR;
 304         }
 305
 306         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 307             if ($HTTP_X_FORWARDED_FOR == '') {
 308                 $HTTP_X_FORWARDED_FOR = 'unknown';
 309             }
 310             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 311         }
 312
 313         $header  = "Received: from $received_from" . $rn;
 314         $header .= "        (SquirrelMail authenticated user $username)" . $rn;
 315         $header .= "        by $SERVER_NAME with HTTP;" . $rn;
 316         $header .= "        $date" . $rn;
 317
 318         /* Insert the rest of the header fields */
 319         $header .= "Message-ID: $message_id" . $rn;
 320         $header .= "Date: $date" . $rn;
 321         $header .= "Subject: $subject" . $rn;
 322         $header .= "From: $from" . $rn;
 323         $header .= "To: $to_list" . $rn;    // Who it's TO
 324
 325         if (isset($more_headers["Content-Type"])) {
 326             $contentType = $more_headers["Content-Type"];
 327             unset($more_headers["Content-Type"]);
 328         }
 329         else {
 330             if (isMultipart($session)) {
 331                 $contentType = "multipart/mixed;";
 332             }
 333             else {
 334                 if ($default_charset != '') {
 335                     $contentType = 'text/plain; charset='.$default_charset;
 336                 }
 337                 else {
 338                     $contentType = 'text/plain;';
 339                 }
 340             }
 341         }
 342
 343         /* Insert headers from the $more_headers array */
 344         if(is_array($more_headers)) {
 345             reset($more_headers);
 346             while(list($h_name, $h_val) = each($more_headers)) {
 347                 if ($h_name == 'References') {
 348                     $h_val = str_replace(' ', "$rn        ", $h_val);
 349                 }
 350                 $header .= sprintf("%s: %s%s", $h_name, $h_val, $rn);
 351             }
 352         }
 353
 354         if ($cc_list) {
 355             $header .= "Cc: $cc_list" . $rn; // Who the CCs are
 356         }
 357
 358         if ($reply_to != '') {
 359             $header .= "Reply-To: $reply_to" . $rn;
 360         }
 361
 362         if ($useSendmail) {
 363             if ($bcc_list) {
 364                 // BCCs is removed from header by sendmail
 365                 $header .= "Bcc: $bcc_list" . $rn;
 366             }
 367         }
 368
 369         /* Identify SquirrelMail */
 370         $header .= "X-Mailer: SquirrelMail (version $version)" . $rn;
 371
 372         /* Do the MIME-stuff */
 373         $header .= "MIME-Version: 1.0" . $rn;
 374
 375         if (isMultipart($session)) {
 376             $header .= 'Content-Type: '.$contentType.' boundary="';
 377             $header .= mimeBoundary();
 378             $header .= "\"$rn";
 379         } else {
 380             $header .= 'Content-Type: ' . $contentType . $rn;
 381             $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 382         }
 383         $header .= $rn; // One blank line to separate header and body
 384
 385         $headerlength = strlen($header);
 386     }
 387
 388     /* Write the header */
 389     fputs ($fp, $header);
 390
 391     return $headerlength;
 392 }
 393
 394 /* Send the body
 395  */
 396 function writeBody ($fp, $passedBody, $session, $rn="\r\n") {
 397     global $default_charset;
 398
 399     $attachmentlength = 0;
 400
 401     if (isMultipart($session)) {
 402         $body = '--'.mimeBoundary() . $rn;
 403
 404         if ($default_charset != "") {
 405             $body .= "Content-Type: text/plain; charset=$default_charset".$rn;
 406         }
 407         else {
 408             $body .= "Content-Type: text/plain" . $rn;
 409         }
 410
 411         $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn;
 412         $body .= $passedBody . $rn . $rn;
 413         fputs ($fp, $body);
 414
 415         $attachmentlength = attachFiles($fp, $session, $rn);
 416
 417         if (!isset($postbody)) {
 418             $postbody = "";
 419         }
 420         $postbody .= $rn . "--" . mimeBoundary() . "--" . $rn . $rn;
 421         fputs ($fp, $postbody);
 422     } else {
 423         $body = $passedBody . $rn;
 424         fputs ($fp, $body);
 425         $postbody = $rn;
 426         fputs ($fp, $postbody);
 427     }
 428
 429     return (strlen($body) + strlen($postbody) + $attachmentlength);
 430 }
 431
 432 /* Send mail using the sendmail command
 433  */
 434 function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) {
 435     global $sendmail_path, $popuser, $username, $domain;
 436
 437     /* Build envelope sender address. Make sure it doesn't contain
 438      * spaces or other "weird" chars that would allow a user to
 439      * exploit the shell/pipe it is used in.
 440      */
 441     $envelopefrom = "$popuser@$domain";
 442     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 443     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 444     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 445
 446     /**
 447      * open pipe to sendmail or qmail-inject
 448      * (qmail-inject doesn't accept -t param)
 449      */
 450     if (strstr($sendmail_path, "qmail-inject")) {
 451         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 452     } else {
 453         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 454     }
 455
 456     $headerlength = write822Header ($fp, $t, $c, $b, $subject,
 457                                     $more_headers, $session, "\n");
 458     $bodylength = writeBody($fp, $body, $session, "\n");
 459
 460     pclose($fp);
 461
 462     return ($headerlength + $bodylength);
 463 }
 464
 465 function smtpReadData($smtpConnection) {
 466     $read = fgets($smtpConnection, 1024);
 467     $counter = 0;
 468     while ($read) {
 469         echo $read . '<BR>';
 470         $data[$counter] = $read;
 471         $read = fgets($smtpConnection, 1024);
 472         $counter++;
 473     }
 474 }
 475
 476 function sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session) {
 477     global $username, $popuser, $domain, $version, $smtpServerAddress,
 478         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 479         $key, $onetimepad;
 480
 481     $to = expandRcptAddrs(parseAddrs($t));
 482     $cc = expandRcptAddrs(parseAddrs($c));
 483     $bcc = expandRcptAddrs(parseAddrs($b));
 484     if (isset($identity) && $identity != 'default') {
 485         $from_addr = getPref($data_dir, $username,
 486                              'email_address' . $identity);
 487     }
 488     else {
 489         $from_addr = getPref($data_dir, $username, 'email_address');
 490     }
 491
 492     if (!$from_addr) {
 493         $from_addr = "$popuser@$domain";
 494     }
 495
 496     /* POP3 BEFORE SMTP CODE HERE */
 497     global $pop_before_smtp;
 498     if (isset($pop_before_smtp) && $pop_before_smtp === true) {
 499         if (!isset($pop_port)) {
 500             $pop_port = 110;
 501         }
 502         if (!isset($pop_server)) {
 503             $pop_server = $smtpServerAddress; /* usually the same host! */
 504         }
 505         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 506         if (!$popConnection) {
 507             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 508                   . " $err_no : $err_str");
 509         } else {
 510             $tmp = fgets($popConnection, 1024); /* banner */
 511             if (!eregi("^\+OK", $tmp, $regs)) {
 512                 return(0);
 513             }
 514             fputs($popConnection, "USER $username\r\n");
 515             $tmp = fgets($popConnection, 1024);
 516             if (!eregi("^\+OK", $tmp, $regs)) {
 517                 return(0);
 518             }
 519             fputs($popConnection, 'PASS ' . OneTimePadDecrypt($key, $onetimepad) . "\r\n");
 520             $tmp = fgets($popConnection, 1024);
 521             if (!eregi("^\+OK", $tmp, $regs)) {
 522                 return(0);
 523             }
 524             fputs($popConnection, "QUIT\r\n"); /* log off */
 525             fclose($popConnection);
 526         }
 527     }
 528
 529     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort,
 530                                 $errorNumber, $errorString);
 531     if (!$smtpConnection) {
 532         echo 'Error connecting to SMTP Server.<br>';
 533         echo "$errorNumber : $errorString<br>";
 534         exit;
 535     }
 536     $tmp = fgets($smtpConnection, 1024);
 537     if (errorCheck($tmp, $smtpConnection)!=5) {
 538         return(0);
 539     }
 540
 541     $to_list = getLineOfAddrs($to);
 542     $cc_list = getLineOfAddrs($cc);
 543
 544     /* Lets introduce ourselves */
 545     if (! isset ($use_authenticated_smtp)
 546         || $use_authenticated_smtp == false) {
 547         fputs($smtpConnection, "HELO $domain\r\n");
 548         $tmp = fgets($smtpConnection, 1024);
 549         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 550     } else {
 551         fputs($smtpConnection, "EHLO $domain\r\n");
 552         $tmp = fgets($smtpConnection, 1024);
 553         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 554
 555         fputs($smtpConnection, "AUTH LOGIN\r\n");
 556         $tmp = fgets($smtpConnection, 1024);
 557         if (errorCheck($tmp, $smtpConnection)!=5) {
 558             return(0);
 559         }
 560
 561         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 562         $tmp = fgets($smtpConnection, 1024);
 563         if (errorCheck($tmp, $smtpConnection)!=5) {
 564             return(0);
 565         }
 566
 567         fputs($smtpConnection, base64_encode
 568               (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 569         $tmp = fgets($smtpConnection, 1024);
 570         if (errorCheck($tmp, $smtpConnection)!=5) {
 571             return(0);
 572         }
 573     }
 574
 575     /* Ok, who is sending the message? */
 576     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 577     $tmp = fgets($smtpConnection, 1024);
 578     if (errorCheck($tmp, $smtpConnection)!=5) {
 579         return(0);
 580     }
 581
 582     /* send who the recipients are */
 583     for ($i = 0; $i < count($to); $i++) {
 584         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 585         $tmp = fgets($smtpConnection, 1024);
 586         if (errorCheck($tmp, $smtpConnection)!=5) {
 587             return(0);
 588         }
 589     }
 590     for ($i = 0; $i < count($cc); $i++) {
 591         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 592         $tmp = fgets($smtpConnection, 1024);
 593         if (errorCheck($tmp, $smtpConnection)!=5) {
 594             return(0);
 595         }
 596     }
 597     for ($i = 0; $i < count($bcc); $i++) {
 598         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 599         $tmp = fgets($smtpConnection, 1024);
 600         if (errorCheck($tmp, $smtpConnection)!=5) {
 601             return(0);
 602         }
 603     }
 604
 605     /* Lets start sending the actual message */
 606     fputs($smtpConnection, "DATA\r\n");
 607     $tmp = fgets($smtpConnection, 1024);
 608     if (errorCheck($tmp, $smtpConnection)!=5) {
 609         return(0);
 610     }
 611
 612     /* Send the message */
 613     $headerlength = write822Header ($smtpConnection, $t, $c, $b,
 614                                     $subject, $more_headers, $session);
 615     $bodylength = writeBody($smtpConnection, $body, $session);
 616
 617     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 618     $tmp = fgets($smtpConnection, 1024);
 619     $num = errorCheck($tmp, $smtpConnection, true);
 620     if ($num != 250) {
 621         return(0);
 622     }
 623
 624     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 625
 626     fclose($smtpConnection);
 627
 628     return ($headerlength + $bodylength);
 629 }
 630
 631
 632 function errorCheck($line, $smtpConnection, $verbose = false) {
 633     global $color, $compose_new_win;
 634
 635     /* Read new lines on a multiline response */
 636     $lines = $line;
 637     while(ereg("^[0-9]+-", $line)) {
 638         $line = fgets($smtpConnection, 1024);
 639         $lines .= $line;
 640     }
 641
 642     /* Status:  0 = fatal
 643      *          5 = ok
 644      */
 645     $err_num = substr($line, 0, strpos($line, " "));
 646     switch ($err_num) {
 647     case 500:   $message = 'Syntax error; command not recognized';
 648         $status = 0;
 649         break;
 650     case 501:   $message = 'Syntax error in parameters or arguments';
 651         $status = 0;
 652         break;
 653     case 502:   $message = 'Command not implemented';
 654         $status = 0;
 655         break;
 656     case 503:   $message = 'Bad sequence of commands';
 657         $status = 0;
 658         break;
 659     case 504:   $message = 'Command parameter not implemented';
 660         $status = 0;
 661         break;
 662
 663     case 211:   $message = 'System status, or system help reply';
 664         $status = 5;
 665         break;
 666     case 214:   $message = 'Help message';
 667         $status = 5;
 668         break;
 669
 670     case 220:   $message = 'Service ready';
 671         $status = 5;
 672         break;
 673     case 221:   $message = 'Service closing transmission channel';
 674         $status = 5;
 675         break;
 676
 677     case 421:   $message = 'Service not available, closing chanel';
 678         $status = 0;
 679         break;
 680
 681     case 235:   return(5);
 682         break;
 683     case 250:   $message = 'Requested mail action okay, completed';
 684         $status = 5;
 685         break;
 686     case 251:   $message = 'User not local; will forward';
 687         $status = 5;
 688         break;
 689     case 334:   return(5); break;
 690     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 691         $status = 0;
 692         break;
 693     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 694         $status = 0;
 695         break;
 696     case 451:   $message = 'Requested action aborted:  error in processing';
 697         $status = 0;
 698         break;
 699     case 551:   $message = 'User not local; please try forwarding';
 700         $status = 0;
 701         break;
 702     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 703         $status = 0;
 704         break;
 705     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 706         $status = 0;
 707         break;
 708     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 709         $status = 0;
 710         break;
 711     case 354:   $message = 'Start mail input; end with .';
 712         $status = 5;
 713         break;
 714     case 554:   $message = 'Transaction failed';
 715         $status = 0;
 716         break;
 717     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 718         $status = 0;
 719         $error_num = '001';
 720         break;
 721     }
 722
 723     if ($status == 0) {
 724         include_once('../functions/page_header.php');
 725         if ($compose_new_win == '1') {
 726             compose_Header($color, 'None');
 727         }
 728         else {
 729             displayPageHeader($color, 'None');
 730         }
 731         include_once('../functions/display_messages.php');
 732         $lines = nl2br(htmlspecialchars($lines));
 733         $msg  = $message . "<br>\nServer replied: $lines";
 734         plain_error_message($msg, $color);
 735     }
 736     if (! $verbose) return $status;
 737     return $err_num;
 738 }
 739
 740 /* create new reference header per rfc2822 */
 741
 742 function calculate_references($refs, $inreplyto, $old_reply_to) {
 743
 744     $refer = "";
 745     for ($i=1;$i<count($refs[0]);$i++) {
 746         if (!empty($refs[0][$i])) {
 747             if (preg_match("/^References:(.+)$/", $refs[0][$i], $regs)) {
 748                 $refer = trim($regs[1]);
 749             }
 750             else {
 751                 $refer .= ' ' . trim($refs[0][$i]);
 752             }
 753         }
 754     }
 755     $refer = trim($refer);
 756     if (strlen($refer) > 2) {
 757         $refer .= ' ' . $inreplyto;
 758     }
 759     else {
 760         if (!empty($old_reply_to)) {
 761             $refer .= $old_reply_to . ' ' . $inreplyto;
 762         }
 763         else {
 764             $refer .= $inreplyto;
 765         }
 766     }
 767     trim($refer);
 768     return $refer;
 769 }
 770
 771 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN,
 772                      $prio = 3, $session) {
 773     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 774         $data_dir, $username, $domain, $key, $version, $sent_folder,
 775         $imapServerAddress, $imapPort, $default_use_priority, $more_headers,
 776         $request_mdn, $request_dr;
 777
 778     $more_headers = Array();
 779
 780     do_hook('smtp_send');
 781
 782     $imap_stream = sqimap_login($username, $key, $imapServerAddress,
 783                                 $imapPort, 1);
 784
 785     if (isset($reply_id) && $reply_id) {
 786         sqimap_mailbox_select ($imap_stream, $mailbox);
 787         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 788
 789         /* Insert In-Reply-To and References headers if the
 790          * message-id of the message we reply to is set (longer than "<>")
 791          * The References header should really be the old Referenced header
 792          * with the message ID appended, and now it is (jmunro)
 793          */
 794         $sid = sqimap_session_id();
 795         $query = "$sid FETCH $reply_id (BODY.PEEK[HEADER.FIELDS (Message-Id In-Reply-To)])\r\n";
 796         fputs ($imap_stream, $query);
 797         $read = sqimap_read_data($imap_stream, $sid, true, $response, $message);
 798         $message_id = '';
 799         $in_reply_to = '';
 800
 801         foreach ($read as $r) {
 802                 if (preg_match("/^message-id:(.*)/iA", $r, $regs)) {
 803                     $message_id = trim($regs[1]);
 804                 }
 805                 if (preg_match("/^in-reply-to:(.*)/iA", $r, $regs)) {
 806                     $in_reply_to = trim($regs[1]);
 807                 }
 808         }
 809
 810         if(strlen($message_id) > 2) {
 811             $refs = get_reference_header ($imap_stream, $reply_id);
 812             $inreplyto = $message_id;
 813             $old_reply_to = $in_reply_to;
 814             $refer = calculate_references ($refs, $inreplyto, $old_reply_to);
 815             $more_headers['In-Reply-To'] = $inreplyto;
 816             $more_headers['References']  = $refer;
 817         }
 818
 819     }
 820     if ($default_use_priority) {
 821         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 822     }
 823
 824     $requestRecipt = 0;
 825     if (isset($request_dr)) {
 826         $requestRecipt += 1;
 827     }
 828     if (isset($request_mdn)) {
 829         $requestRecipt += 2;
 830     }
 831     if ( $requestRecipt > 0) {
 832         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 833     }
 834
 835     /* In order to remove the problem of users not able to create
 836      * messages with "." on a blank line, RFC821 has made provision
 837      * in section 4.5.2 (Transparency).
 838      */
 839     $body = ereg_replace("\n\\.", "\n..", $body);
 840     $body = ereg_replace("^\\.", "..", $body);
 841
 842     /* this is to catch all plain \n instances and
 843      * replace them with \r\n.  All newlines were converted
 844      * into just \n inside the compose.php file.
 845      * But only if delimiter is, in fact, \r\n.
 846      */
 847
 848     if ($MDN) {
 849         $more_headers["Content-Type"] = "multipart/report; ".
 850             "report-type=disposition-notification;";
 851     }
 852
 853     if ($useSendmail) {
 854         $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers,
 855                                $session);
 856     } else {
 857         $body = ereg_replace("\n", "\r\n", $body);
 858         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers,
 859                            $session);
 860     }
 861     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 862         if ($useSendmail) $body = ereg_replace("\n", "\r\n", $body);
 863         sqimap_append ($imap_stream, $sent_folder, $length);
 864         write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers,
 865                         $session);
 866         writeBody ($imap_stream, $body, $session);
 867         sqimap_append_done ($imap_stream);
 868     }
 869     sqimap_logout($imap_stream);
 870     /* Delete the files uploaded for attaching (if any).
 871      * only if $length != 0 (if there was no error)
 872      */
 873     if ($length) {
 874         ClearAttachments($session);
 875     }
 876
 877     return $length;
 878 }
 879
 880 function createPriorityHeaders($prio) {
 881     $prio_headers = Array();
 882     $prio_headers['X-Priority'] = $prio;
 883
 884     switch($prio) {
 885     case 1: $prio_headers['Importance'] = 'High';
 886         $prio_headers['X-MSMail-Priority'] = 'High';
 887         break;
 888
 889     case 3: $prio_headers['Importance'] = 'Normal';
 890         $prio_headers['X-MSMail-Priority'] = 'Normal';
 891         break;
 892
 893     case 5:
 894         $prio_headers['Importance'] = 'Low';
 895         $prio_headers['X-MSMail-Priority'] = 'Low';
 896         break;
 897     }
 898     return  $prio_headers;
 899 }
 900
 901 function createReceiptHeaders($receipt) {
 902
 903     GLOBAL $data_dir, $username, $identity, $popuser, $domain;
 904
 905     $receipt_headers = Array();
 906     if (isset($identity) && $identity != 'default') {
 907         $from = getPref($data_dir, $username, 'full_name' . $identity);
 908         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 909     } else {
 910         $from = getPref($data_dir, $username, 'full_name');
 911         $from_addr = getPref($data_dir, $username, 'email_address');
 912     }
 913     if ($from_addr == '') {
 914         $from_addr = $popuser.'@'.$domain;
 915     }
 916
 917     if ($from == '') {
 918         $from = "<$from_addr>";
 919     }
 920     else {
 921         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 922     }
 923
 924     /* On Delivery */
 925     if ( $receipt == 1
 926         || $receipt == 3 ) {
 927         $receipt_headers["Return-Receipt-To"] = $from;
 928     }
 929     /* On Read */
 930     if ($receipt == 2
 931         || $receipt == 3 ) {
 932         /* Pegasus Mail */
 933         $receipt_headers["X-Confirm-Reading-To"] = $from;
 934         /* RFC 2298 */
 935         $receipt_headers["Disposition-Notification-To"] = $from;
 936     }
 937     return $receipt_headers;
 938 }
 939
 940
 941 ?>