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                                         if ($fp) fputs ($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                         if ($fp) fputs($fp, $tmp);
 167                         $length += strlen($tmp);
 168                     }
 169                 } else {
 170                     $header .= "Content-Transfer-Encoding: base64"
 171                         . "$rn" . "$rn";
 172                     if ($fp) 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                         if ($fp) fputs ($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, $headerrn;
 258
 259     if ($header == '') {
 260                 $headerrn = $rn;
 261         $to = expandAddrs(parseAddrs($t));
 262         $cc = expandAddrs(parseAddrs($c));
 263         $bcc = expandAddrs(parseAddrs($b));
 264         if (isset($identity) && $identity != 'default') {
 265             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 266             $from = getPref($data_dir, $username, 'full_name' . $identity);
 267             $from_addr = getFrom();
 268         } else {
 269             $reply_to = getPref($data_dir, $username, 'reply_to');
 270             $from = getPref($data_dir, $username, 'full_name');
 271             $from_addr = getFrom();
 272         }
 273
 274         $to_list = getLineOfAddrs($to);
 275         $cc_list = getLineOfAddrs($cc);
 276         $bcc_list = getLineOfAddrs($bcc);
 277
 278         /* Encoding 8-bit characters and making from line */
 279         $subject = encodeHeader($subject);
 280         if ($from == '') {
 281             $from = "<$from_addr>";
 282         }
 283         else {
 284             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 285         }
 286
 287         /* This creates an RFC 822 date */
 288         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 289
 290         /* Create a message-id */
 291         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 292         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 293
 294         /* Make an RFC822 Received: line */
 295         if (isset($REMOTE_HOST)) {
 296             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 297         }
 298         else {
 299             $received_from = $REMOTE_ADDR;
 300         }
 301
 302         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 303             if ($HTTP_X_FORWARDED_FOR == '') {
 304                 $HTTP_X_FORWARDED_FOR = 'unknown';
 305             }
 306             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 307         }
 308
 309         $header  = "Received: from $received_from" . $rn;
 310         $header .= "        (SquirrelMail authenticated user $username)" . $rn;
 311         $header .= "        by $SERVER_NAME with HTTP;" . $rn;
 312         $header .= "        $date" . $rn;
 313
 314         /* Insert the rest of the header fields */
 315         $header .= "Message-ID: $message_id" . $rn;
 316         $header .= "Date: $date" . $rn;
 317         $header .= "Subject: $subject" . $rn;
 318         $header .= "From: $from" . $rn;
 319         $header .= "To: $to_list" . $rn;    // Who it's TO
 320
 321         if (isset($more_headers["Content-Type"])) {
 322             $contentType = $more_headers["Content-Type"];
 323             unset($more_headers["Content-Type"]);
 324         }
 325         else {
 326             if (isMultipart($session)) {
 327                 $contentType = "multipart/mixed;";
 328             }
 329             else {
 330                 if ($default_charset != '') {
 331                     $contentType = 'text/plain; charset='.$default_charset;
 332                 }
 333                 else {
 334                     $contentType = 'text/plain;';
 335                 }
 336             }
 337         }
 338
 339         /* Insert headers from the $more_headers array */
 340         if(is_array($more_headers)) {
 341             reset($more_headers);
 342             while(list($h_name, $h_val) = each($more_headers)) {
 343                 if ($h_name == 'References') {
 344                     $h_val = str_replace(' ', "$rn        ", $h_val);
 345                 }
 346                 $header .= sprintf("%s: %s%s", $h_name, $h_val, $rn);
 347             }
 348         }
 349
 350         if ($cc_list) {
 351             $header .= "Cc: $cc_list" . $rn; // Who the CCs are
 352         }
 353
 354         if ($reply_to != '') {
 355             $header .= "Reply-To: $reply_to" . $rn;
 356         }
 357
 358         if ($useSendmail) {
 359             if ($bcc_list) {
 360                 // BCCs is removed from header by sendmail
 361                 $header .= "Bcc: $bcc_list" . $rn;
 362             }
 363         }
 364
 365         /* Identify SquirrelMail */
 366         $header .= "X-Mailer: SquirrelMail (version $version)" . $rn;
 367
 368         /* Do the MIME-stuff */
 369         $header .= "MIME-Version: 1.0" . $rn;
 370
 371         if (isMultipart($session)) {
 372             $header .= 'Content-Type: '.$contentType.' boundary="';
 373             $header .= mimeBoundary();
 374             $header .= "\"$rn";
 375         } else {
 376             $header .= 'Content-Type: ' . $contentType . $rn;
 377             $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 378         }
 379         $header .= $rn; // One blank line to separate header and body
 380
 381         $headerlength = strlen($header);
 382     }
 383
 384         if ($headerrn != $rn) {
 385                 $header = str_replace($headerrn, $rn, $header);
 386         $headerlength = strlen($header);
 387                 $headerrn = $rn;
 388         }
 389
 390     /* Write the header */
 391     if ($fp) fputs ($fp, $header);
 392
 393     return $headerlength;
 394 }
 395
 396 /* Send the body
 397  */
 398 function writeBody ($fp, $passedBody, $session, $rn="\r\n") {
 399     global $default_charset;
 400
 401     $attachmentlength = 0;
 402
 403     if (isMultipart($session)) {
 404         $body = '--'.mimeBoundary() . $rn;
 405
 406         if ($default_charset != "") {
 407             $body .= "Content-Type: text/plain; charset=$default_charset".$rn;
 408         }
 409         else {
 410             $body .= "Content-Type: text/plain" . $rn;
 411         }
 412
 413         $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn;
 414         $body .= $passedBody . $rn . $rn;
 415         if ($fp) fputs ($fp, $body);
 416
 417         $attachmentlength = attachFiles($fp, $session, $rn);
 418
 419         if (!isset($postbody)) {
 420             $postbody = "";
 421         }
 422         $postbody .= $rn . "--" . mimeBoundary() . "--" . $rn . $rn;
 423         if ($fp) fputs ($fp, $postbody);
 424     } else {
 425         $body = $passedBody . $rn;
 426         if ($fp) fputs ($fp, $body);
 427         $postbody = $rn;
 428         if ($fp) fputs ($fp, $postbody);
 429     }
 430
 431     return (strlen($body) + strlen($postbody) + $attachmentlength);
 432 }
 433
 434 /* Send mail using the sendmail command
 435  */
 436 function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) {
 437     global $sendmail_path, $popuser, $username, $domain;
 438
 439     /* Build envelope sender address. Make sure it doesn't contain
 440      * spaces or other "weird" chars that would allow a user to
 441      * exploit the shell/pipe it is used in.
 442      */
 443     $envelopefrom = getFrom();
 444     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 445     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 446     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 447
 448     /**
 449      * open pipe to sendmail or qmail-inject
 450      * (qmail-inject doesn't accept -t param)
 451      */
 452     if (strstr($sendmail_path, "qmail-inject")) {
 453         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 454     } else {
 455         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 456     }
 457
 458     $headerlength = write822Header ($fp, $t, $c, $b, $subject,
 459                                     $more_headers, $session, "\n");
 460     $bodylength = writeBody($fp, $body, $session, "\n");
 461
 462     pclose($fp);
 463
 464     return ($headerlength + $bodylength);
 465 }
 466
 467 function smtpReadData($smtpConnection) {
 468     $read = fgets($smtpConnection, 1024);
 469     $counter = 0;
 470     while ($read) {
 471         echo $read . '<BR>';
 472         $data[$counter] = $read;
 473         $read = fgets($smtpConnection, 1024);
 474         $counter++;
 475     }
 476 }
 477
 478 function sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session) {
 479     global $username, $popuser, $domain, $version, $smtpServerAddress,
 480         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 481         $key, $onetimepad;
 482
 483     $to = expandRcptAddrs(parseAddrs($t));
 484     $cc = expandRcptAddrs(parseAddrs($c));
 485     $bcc = expandRcptAddrs(parseAddrs($b));
 486     if (isset($identity) && $identity != 'default') {
 487         $from_addr = getPref($data_dir, $username,
 488                              'email_address' . $identity);
 489     }
 490     else {
 491         $from_addr = getPref($data_dir, $username, 'email_address');
 492     }
 493
 494     if (!$from_addr) {
 495         $from_addr = "$popuser@$domain";
 496     }
 497
 498     /* POP3 BEFORE SMTP CODE HERE */
 499     global $pop_before_smtp;
 500     if (isset($pop_before_smtp) && $pop_before_smtp === true) {
 501         if (!isset($pop_port)) {
 502             $pop_port = 110;
 503         }
 504         if (!isset($pop_server)) {
 505             $pop_server = $smtpServerAddress; /* usually the same host! */
 506         }
 507         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 508         if (!$popConnection) {
 509             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 510                   . " $err_no : $err_str");
 511         } else {
 512             $tmp = fgets($popConnection, 1024); /* banner */
 513             if (!eregi("^\+OK", $tmp, $regs)) {
 514                 return(0);
 515             }
 516             fputs($popConnection, "USER $username\r\n");
 517             $tmp = fgets($popConnection, 1024);
 518             if (!eregi("^\+OK", $tmp, $regs)) {
 519                 return(0);
 520             }
 521             fputs($popConnection, 'PASS ' . OneTimePadDecrypt($key, $onetimepad) . "\r\n");
 522             $tmp = fgets($popConnection, 1024);
 523             if (!eregi("^\+OK", $tmp, $regs)) {
 524                 return(0);
 525             }
 526             fputs($popConnection, "QUIT\r\n"); /* log off */
 527             fclose($popConnection);
 528         }
 529     }
 530
 531     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort,
 532                                 $errorNumber, $errorString);
 533     if (!$smtpConnection) {
 534         echo 'Error connecting to SMTP Server.<br>';
 535         echo "$errorNumber : $errorString<br>";
 536         exit;
 537     }
 538     $tmp = fgets($smtpConnection, 1024);
 539     if (errorCheck($tmp, $smtpConnection)!=5) {
 540         return(0);
 541     }
 542
 543     $to_list = getLineOfAddrs($to);
 544     $cc_list = getLineOfAddrs($cc);
 545
 546     /* Lets introduce ourselves */
 547     if (! isset ($use_authenticated_smtp)
 548         || $use_authenticated_smtp == false) {
 549         fputs($smtpConnection, "HELO $domain\r\n");
 550         $tmp = fgets($smtpConnection, 1024);
 551         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 552     } else {
 553         fputs($smtpConnection, "EHLO $domain\r\n");
 554         $tmp = fgets($smtpConnection, 1024);
 555         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 556
 557         fputs($smtpConnection, "AUTH LOGIN\r\n");
 558         $tmp = fgets($smtpConnection, 1024);
 559         if (errorCheck($tmp, $smtpConnection)!=5) {
 560             return(0);
 561         }
 562
 563         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 564         $tmp = fgets($smtpConnection, 1024);
 565         if (errorCheck($tmp, $smtpConnection)!=5) {
 566             return(0);
 567         }
 568
 569         fputs($smtpConnection, base64_encode
 570               (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 571         $tmp = fgets($smtpConnection, 1024);
 572         if (errorCheck($tmp, $smtpConnection)!=5) {
 573             return(0);
 574         }
 575     }
 576
 577     /* Ok, who is sending the message? */
 578     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 579     $tmp = fgets($smtpConnection, 1024);
 580     if (errorCheck($tmp, $smtpConnection)!=5) {
 581         return(0);
 582     }
 583
 584     /* send who the recipients are */
 585     for ($i = 0; $i < count($to); $i++) {
 586         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 587         $tmp = fgets($smtpConnection, 1024);
 588         if (errorCheck($tmp, $smtpConnection)!=5) {
 589             return(0);
 590         }
 591     }
 592     for ($i = 0; $i < count($cc); $i++) {
 593         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 594         $tmp = fgets($smtpConnection, 1024);
 595         if (errorCheck($tmp, $smtpConnection)!=5) {
 596             return(0);
 597         }
 598     }
 599     for ($i = 0; $i < count($bcc); $i++) {
 600         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 601         $tmp = fgets($smtpConnection, 1024);
 602         if (errorCheck($tmp, $smtpConnection)!=5) {
 603             return(0);
 604         }
 605     }
 606
 607     /* Lets start sending the actual message */
 608     fputs($smtpConnection, "DATA\r\n");
 609     $tmp = fgets($smtpConnection, 1024);
 610     if (errorCheck($tmp, $smtpConnection)!=5) {
 611         return(0);
 612     }
 613
 614     /* Send the message */
 615     $headerlength = write822Header ($smtpConnection, $t, $c, $b,
 616                                     $subject, $more_headers, $session);
 617     $bodylength = writeBody($smtpConnection, $body, $session);
 618
 619     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 620     $tmp = fgets($smtpConnection, 1024);
 621     $num = errorCheck($tmp, $smtpConnection, true);
 622     if ($num != 250) {
 623         return(0);
 624     }
 625
 626     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 627
 628     fclose($smtpConnection);
 629
 630     return ($headerlength + $bodylength);
 631 }
 632
 633
 634 function errorCheck($line, $smtpConnection, $verbose = false) {
 635     global $color, $compose_new_win;
 636
 637     /* Read new lines on a multiline response */
 638     $lines = $line;
 639     while(ereg("^[0-9]+-", $line)) {
 640         $line = fgets($smtpConnection, 1024);
 641         $lines .= $line;
 642     }
 643
 644     /* Status:  0 = fatal
 645      *          5 = ok
 646      */
 647     $err_num = substr($line, 0, strpos($line, " "));
 648     switch ($err_num) {
 649     case 500:   $message = 'Syntax error; command not recognized';
 650         $status = 0;
 651         break;
 652     case 501:   $message = 'Syntax error in parameters or arguments';
 653         $status = 0;
 654         break;
 655     case 502:   $message = 'Command not implemented';
 656         $status = 0;
 657         break;
 658     case 503:   $message = 'Bad sequence of commands';
 659         $status = 0;
 660         break;
 661     case 504:   $message = 'Command parameter not implemented';
 662         $status = 0;
 663         break;
 664
 665     case 211:   $message = 'System status, or system help reply';
 666         $status = 5;
 667         break;
 668     case 214:   $message = 'Help message';
 669         $status = 5;
 670         break;
 671
 672     case 220:   $message = 'Service ready';
 673         $status = 5;
 674         break;
 675     case 221:   $message = 'Service closing transmission channel';
 676         $status = 5;
 677         break;
 678
 679     case 421:   $message = 'Service not available, closing chanel';
 680         $status = 0;
 681         break;
 682
 683     case 235:   return(5);
 684         break;
 685     case 250:   $message = 'Requested mail action okay, completed';
 686         $status = 5;
 687         break;
 688     case 251:   $message = 'User not local; will forward';
 689         $status = 5;
 690         break;
 691     case 334:   return(5); break;
 692     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 693         $status = 0;
 694         break;
 695     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 696         $status = 0;
 697         break;
 698     case 451:   $message = 'Requested action aborted:  error in processing';
 699         $status = 0;
 700         break;
 701     case 551:   $message = 'User not local; please try forwarding';
 702         $status = 0;
 703         break;
 704     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 705         $status = 0;
 706         break;
 707     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 708         $status = 0;
 709         break;
 710     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 711         $status = 0;
 712         break;
 713     case 354:   $message = 'Start mail input; end with .';
 714         $status = 5;
 715         break;
 716     case 554:   $message = 'Transaction failed';
 717         $status = 0;
 718         break;
 719     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 720         $status = 0;
 721         $error_num = '001';
 722         break;
 723     }
 724
 725     if ($status == 0) {
 726         include_once('../functions/page_header.php');
 727         if ($compose_new_win == '1') {
 728             compose_Header($color, 'None');
 729         }
 730         else {
 731             displayPageHeader($color, 'None');
 732         }
 733         include_once('../functions/display_messages.php');
 734         $lines = nl2br(htmlspecialchars($lines));
 735         $msg  = $message . "<br>\nServer replied: $lines";
 736         plain_error_message($msg, $color);
 737     }
 738     if (! $verbose) return $status;
 739     return $err_num;
 740 }
 741
 742 /* create new reference header per rfc2822 */
 743
 744 function calculate_references($refs, $inreplyto, $old_reply_to) {
 745
 746     $refer = "";
 747     for ($i=1;$i<count($refs[0]);$i++) {
 748         if (!empty($refs[0][$i])) {
 749             if (preg_match("/^References:(.+)$/", $refs[0][$i], $regs)) {
 750                 $refer = trim($regs[1]);
 751             }
 752             else {
 753                 $refer .= ' ' . trim($refs[0][$i]);
 754             }
 755         }
 756     }
 757     $refer = trim($refer);
 758     if (strlen($refer) > 2) {
 759         $refer .= ' ' . $inreplyto;
 760     }
 761     else {
 762         if (!empty($old_reply_to)) {
 763             $refer .= $old_reply_to . ' ' . $inreplyto;
 764         }
 765         else {
 766             $refer .= $inreplyto;
 767         }
 768     }
 769     trim($refer);
 770     return $refer;
 771 }
 772
 773 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN,
 774                      $prio = 3, $session) {
 775     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 776         $data_dir, $username, $domain, $key, $version, $sent_folder,
 777         $imapServerAddress, $imapPort, $default_use_priority, $more_headers,
 778         $request_mdn, $request_dr;
 779
 780     $more_headers = Array();
 781
 782     do_hook('smtp_send');
 783
 784     $imap_stream = sqimap_login($username, $key, $imapServerAddress,
 785                                 $imapPort, 1);
 786
 787     if (isset($reply_id) && $reply_id) {
 788         sqimap_mailbox_select ($imap_stream, $mailbox);
 789         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 790
 791         /* Insert In-Reply-To and References headers if the
 792          * message-id of the message we reply to is set (longer than "<>")
 793          * The References header should really be the old Referenced header
 794          * with the message ID appended, and now it is (jmunro)
 795          */
 796         $sid = sqimap_session_id();
 797         $query = "$sid FETCH $reply_id (BODY.PEEK[HEADER.FIELDS (Message-Id In-Reply-To)])\r\n";
 798         fputs ($imap_stream, $query);
 799         $read = sqimap_read_data($imap_stream, $sid, true, $response, $message);
 800         $message_id = '';
 801         $in_reply_to = '';
 802
 803         foreach ($read as $r) {
 804                 if (preg_match("/^message-id:(.*)/iA", $r, $regs)) {
 805                     $message_id = trim($regs[1]);
 806                 }
 807                 if (preg_match("/^in-reply-to:(.*)/iA", $r, $regs)) {
 808                     $in_reply_to = trim($regs[1]);
 809                 }
 810         }
 811
 812         if(strlen($message_id) > 2) {
 813             $refs = get_reference_header ($imap_stream, $reply_id);
 814             $inreplyto = $message_id;
 815             $old_reply_to = $in_reply_to;
 816             $refer = calculate_references ($refs, $inreplyto, $old_reply_to);
 817             $more_headers['In-Reply-To'] = $inreplyto;
 818             $more_headers['References']  = $refer;
 819         }
 820
 821     }
 822     if ($default_use_priority) {
 823         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 824     }
 825
 826     $requestRecipt = 0;
 827     if (isset($request_dr)) {
 828         $requestRecipt += 1;
 829     }
 830     if (isset($request_mdn)) {
 831         $requestRecipt += 2;
 832     }
 833     if ( $requestRecipt > 0) {
 834         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 835     }
 836
 837     /* In order to remove the problem of users not able to create
 838      * messages with "." on a blank line, RFC821 has made provision
 839      * in section 4.5.2 (Transparency).
 840      */
 841     $body = ereg_replace("\n\\.", "\n..", $body);
 842     $body = ereg_replace("^\\.", "..", $body);
 843
 844     /* this is to catch all plain \n instances and
 845      * replace them with \r\n.  All newlines were converted
 846      * into just \n inside the compose.php file.
 847      * But only if delimiter is, in fact, \r\n.
 848      */
 849
 850     if ($MDN) {
 851         $more_headers["Content-Type"] = "multipart/report; ".
 852             "report-type=disposition-notification;";
 853     }
 854
 855     if ($useSendmail) {
 856         $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers,
 857                                $session);
 858         $body = ereg_replace("\n", "\r\n", $body);
 859     } else {
 860         $body = ereg_replace("\n", "\r\n", $body);
 861         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers,
 862                            $session);
 863     }
 864     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 865                 $headerlength = write822Header (FALSE, $t, $c, $b, $subject, $more_headers, $session, "\r\n");
 866                 $bodylength = writeBody(FALSE, $body, $session, "\r\n");
 867                 $length = $headerlength + $bodylength;
 868
 869         sqimap_append ($imap_stream, $sent_folder, $length);
 870         write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers,
 871                         $session);
 872         writeBody ($imap_stream, $body, $session);
 873         sqimap_append_done ($imap_stream);
 874     }
 875     sqimap_logout($imap_stream);
 876     /* Delete the files uploaded for attaching (if any).
 877      * only if $length != 0 (if there was no error)
 878      */
 879     if ($length) {
 880         ClearAttachments($session);
 881     }
 882
 883     return $length;
 884 }
 885
 886 function createPriorityHeaders($prio) {
 887     $prio_headers = Array();
 888     $prio_headers['X-Priority'] = $prio;
 889
 890     switch($prio) {
 891     case 1: $prio_headers['Importance'] = 'High';
 892         $prio_headers['X-MSMail-Priority'] = 'High';
 893         break;
 894
 895     case 3: $prio_headers['Importance'] = 'Normal';
 896         $prio_headers['X-MSMail-Priority'] = 'Normal';
 897         break;
 898
 899     case 5:
 900         $prio_headers['Importance'] = 'Low';
 901         $prio_headers['X-MSMail-Priority'] = 'Low';
 902         break;
 903     }
 904     return  $prio_headers;
 905 }
 906
 907 function createReceiptHeaders($receipt) {
 908
 909     GLOBAL $data_dir, $username, $identity, $popuser, $domain;
 910
 911     $receipt_headers = Array();
 912     if (isset($identity) && $identity != 'default') {
 913         $from = getPref($data_dir, $username, 'full_name' . $identity);
 914         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 915     } else {
 916         $from = getPref($data_dir, $username, 'full_name');
 917         $from_addr = getPref($data_dir, $username, 'email_address');
 918     }
 919     if ($from_addr == '') {
 920         $from_addr = $popuser.'@'.$domain;
 921     }
 922
 923     if ($from == '') {
 924         $from = "<$from_addr>";
 925     }
 926     else {
 927         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 928     }
 929
 930     /* On Delivery */
 931     if ( $receipt == 1
 932         || $receipt == 3 ) {
 933         $receipt_headers["Return-Receipt-To"] = $from;
 934     }
 935     /* On Read */
 936     if ($receipt == 2
 937         || $receipt == 3 ) {
 938         /* Pegasus Mail */
 939         $receipt_headers["X-Confirm-Reading-To"] = $from;
 940         /* RFC 2298 */
 941         $receipt_headers["Disposition-Notification-To"] = $from;
 942     }
 943     return $receipt_headers;
 944 }
 945
 946 /* Figure out what the 'From:' address is
 947  */
 948
 949 function getFrom() {
 950     global $username, $popuser, $domain, $data_dir, $identity;
 951     if (isset($identity) && $identity != 'default') {
 952         $from_addr = getPref($data_dir, $username,
 953                              'email_address' . $identity);
 954     }
 955     else {
 956         $from_addr = getPref($data_dir, $username, 'email_address');
 957     }
 958
 959     if (!$from_addr) {
 960         $from_addr = "$popuser@$domain";
 961     }
 962     return $from_addr;
 963 }
 964
 965
 966 ?>