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