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 () {
  36     global $attachments;
  37
  38     if (count($attachments)>0) {
  39         return true;
  40     }
  41     else {
  42         return false;
  43     }
  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     $abook = addressbook_init(false);
  59     for ($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     $abook = addressbook_init(false);
  93     for ($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) {
 114     global $attachments, $attachment_dir, $username;
 115
 116     $length = 0;
 117
 118     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 119     if (isMultipart()) {
 120         foreach ($attachments as $info) {
 121             if (isset($info['type'])) {
 122                 $filetype = $info['type'];
 123             }
 124             else {
 125                 $filetype = 'application/octet-stream';
 126             }
 127
 128             $header = '--' . mimeBoundary() . "\r\n";
 129             if ( isset($info['remotefilename']) && $info['remotefilename'] != '') {
 130                 $header .= "Content-Type: $filetype; name=\"" .
 131                     $info['remotefilename'] . "\"\r\n";
 132                 $header .= "Content-Disposition: attachment; filename=\"" .
 133                     $info['remotefilename'] . "\"\r\n";
 134             } else {
 135                 $header .= "Content-Type: $filetype;\r\n";
 136             }
 137
 138
 139             /* Use 'rb' for NT systems -- read binary
 140              * Unix doesn't care -- everything's binary!  :-)
 141              */
 142
 143             $filename = $hashed_attachment_dir . '/' . $info['localfilename'];
 144             $file = fopen ($filename, 'rb');
 145             if (substr($filetype, 0, 5) == 'text/' ||
 146                 $filetype == 'message/rfc822' || $filetype == 'message/disposition-notification' )  {
 147                 $header .= "\r\n";
 148                 fputs ($fp, $header);
 149                 $length += strlen($header);
 150                 while ($tmp = fgets($file, 4096)) {
 151                     $tmp = str_replace("\r\n", "\n", $tmp);
 152                     $tmp = str_replace("\r", "\n", $tmp);
 153                     $tmp = str_replace("\n", "\r\n", $tmp);
 154                     if (feof($fp) && substr($tmp, -2) != "\r\n") {
 155                         $tmp .= "\r\n";
 156                     }
 157                     fputs($fp, $tmp);
 158                     $length += strlen($tmp);
 159                 }
 160             } else {
 161                 $header .= "Content-Transfer-Encoding: base64\r\n\r\n";
 162                 fputs ($fp, $header);
 163                 $length += strlen($header);
 164                 while ($tmp = fread($file, 570)) {
 165                     $encoded = chunk_split(base64_encode($tmp));
 166                     $length += strlen($encoded);
 167                     fputs ($fp, $encoded);
 168                 }
 169             }
 170             fclose ($file);
 171         }
 172     }
 173     return $length;
 174 }
 175
 176 /* Delete files that are uploaded for attaching
 177  */
 178 function deleteAttachments() {
 179     global $attachments, $attachment_dir;
 180
 181     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 182     if (isMultipart()) {
 183         reset($attachments);
 184         while (list($localname, $remotename) = each($attachments)) {
 185             if (!ereg ("\\/", $localname)) {
 186                 $filename = $hashed_attachment_dir . '/' . $localname;
 187                 unlink ($filename);
 188                 unlink ("$filename.info");
 189             }
 190         }
 191     }
 192 }
 193
 194 /* Return a nice MIME-boundary
 195  */
 196 function mimeBoundary () {
 197     static $mimeBoundaryString;
 198
 199     if ( !isset( $mimeBoundaryString ) ||
 200          $mimeBoundaryString == '') {
 201         $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
 202                               mt_rand( 10000, 99999 );
 203     }
 204
 205     return $mimeBoundaryString;
 206 }
 207
 208 /* Time offset for correct timezone */
 209 function timezone () {
 210     global $invert_time;
 211
 212     $diff_second = date('Z');
 213     if ($invert_time) {
 214         $diff_second = - $diff_second;
 215     }
 216     if ($diff_second > 0) {
 217         $sign = '+';
 218     }
 219     else {
 220         $sign = '-';
 221     }
 222
 223     $diff_second = abs($diff_second);
 224
 225     $diff_hour = floor ($diff_second / 3600);
 226     $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 227
 228     $zonename = '('.strftime('%Z').')';
 229     $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
 230     return ($result);
 231 }
 232
 233 /* Print all the needed RFC822 headers */
 234 function write822Header ($fp, $t, $c, $b, $subject, $MDN, $more_headers) {
 235     global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 236     global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 237     global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 238     global $REMOTE_HOST, $identity;
 239     global $request_mdn;
 240
 241     /* Storing the header to make sure the header is the same
 242      * everytime the header is printed.
 243      */
 244     static $header, $headerlength;
 245
 246     if ($header == '') {
 247         $to = expandAddrs(parseAddrs($t));
 248         $cc = expandAddrs(parseAddrs($c));
 249         $bcc = expandAddrs(parseAddrs($b));
 250         if (isset($identity) && $identity != 'default') {
 251             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 252             $from = getPref($data_dir, $username, 'full_name' . $identity);
 253             $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 254         } else {
 255             $reply_to = getPref($data_dir, $username, 'reply_to');
 256             $from = getPref($data_dir, $username, 'full_name');
 257             $from_addr = getPref($data_dir, $username, 'email_address');
 258         }
 259
 260         if ($from_addr == '') {
 261             $from_addr = $popuser.'@'.$domain;
 262         }
 263
 264         $to_list = getLineOfAddrs($to);
 265         $cc_list = getLineOfAddrs($cc);
 266         $bcc_list = getLineOfAddrs($bcc);
 267
 268         /* Encoding 8-bit characters and making from line */
 269         $subject = encodeHeader($subject);
 270         if ($from == '') {
 271             $from = "<$from_addr>";
 272         }
 273         else {
 274             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 275         }
 276
 277         /* This creates an RFC 822 date */
 278         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 279
 280         /* Create a message-id */
 281         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 282         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 283
 284         /* Make an RFC822 Received: line */
 285         if (isset($REMOTE_HOST)) {
 286             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 287         }
 288         else {
 289             $received_from = $REMOTE_ADDR;
 290         }
 291
 292         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 293             if ($HTTP_X_FORWARDED_FOR == '') {
 294                 $HTTP_X_FORWARDED_FOR = 'unknown';
 295             }
 296             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 297         }
 298
 299         $header  = "Received: from $received_from\r\n";
 300         $header .= "        (SquirrelMail authenticated user $username)\r\n";
 301         $header .= "        by $SERVER_NAME with HTTP;\r\n";
 302         $header .= "        $date\r\n";
 303
 304         /* Insert the rest of the header fields */
 305         $header .= "Message-ID: $message_id\r\n";
 306         $header .= "Date: $date\r\n";
 307         $header .= "Subject: $subject\r\n";
 308         $header .= "From: $from\r\n";
 309         $header .= "To: $to_list\r\n";    // Who it's TO
 310
 311         if (isset($request_mdn)) {
 312             $more_headers["Disposition-Notification-To"] = "$from_addr";
 313         }
 314
 315         /* Insert headers from the $more_headers array */
 316         if(is_array($more_headers)) {
 317             reset($more_headers);
 318             while(list($h_name, $h_val) = each($more_headers)) {
 319                 $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 320             }
 321         }
 322
 323         if ($cc_list) {
 324             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 325         }
 326
 327         if ($reply_to != '') {
 328             $header .= "Reply-To: $reply_to\r\n";
 329         }
 330
 331         if ($useSendmail) {
 332             if ($bcc_list) {
 333                 // BCCs is removed from header by sendmail
 334                 $header .= "Bcc: $bcc_list\r\n";
 335             }
 336         }
 337
 338         $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; /* Identify SquirrelMail */
 339
 340         /* Do the MIME-stuff */
 341         $header .= "MIME-Version: 1.0\r\n";
 342
 343         if (isMultipart()) {
 344             if ($MDN) {
 345                 $header .= "Content-Type: multipart/report;\r\n";
 346                 $header .= "        report-type=disposition-notification;\r\n";
 347                 $header .= '        boundary="';
 348                 $header .= mimeBoundary();
 349                 $header .= "\"\r\n";
 350             }
 351             else {
 352                 $header .= 'Content-Type: multipart/mixed; boundary="';
 353                 $header .= mimeBoundary();
 354                 $header .= "\"\r\n";
 355             }
 356         } else {
 357             if ($default_charset != '') {
 358                 $header .= "Content-Type: text/plain; charset=$default_charset\r\n";
 359             }
 360             else {
 361                 $header .= "Content-Type: text/plain;\r\n";
 362             }
 363             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 364         }
 365         $header .= "\r\n"; // One blank line to separate header and body
 366
 367         $headerlength = strlen($header);
 368     }
 369
 370     /* Write the header */
 371     fputs ($fp, $header);
 372
 373     return $headerlength;
 374 }
 375
 376 /* Send the body
 377  */
 378 function writeBody ($fp, $passedBody) {
 379     global $default_charset;
 380
 381     $attachmentlength = 0;
 382
 383     if (isMultipart()) {
 384         $body = '--'.mimeBoundary()."\r\n";
 385
 386         if ($default_charset != "") {
 387             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 388         }
 389         else {
 390             $body .= "Content-Type: text/plain\r\n";
 391         }
 392
 393         $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 394         $body .= $passedBody . "\r\n\r\n";
 395         fputs ($fp, $body);
 396
 397         $attachmentlength = attachFiles($fp);
 398
 399         if (!isset($postbody)) {
 400             $postbody = "";
 401         }
 402         $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 403         fputs ($fp, $postbody);
 404     } else {
 405         $body = $passedBody . "\r\n";
 406         fputs ($fp, $body);
 407         $postbody = "\r\n";
 408         fputs ($fp, $postbody);
 409     }
 410
 411     return (strlen($body) + strlen($postbody) + $attachmentlength);
 412 }
 413
 414 /* Send mail using the sendmail command
 415  */
 416 function sendSendmail($t, $c, $b, $subject, $body, $MDN, $more_headers) {
 417     global $sendmail_path, $popuser, $username, $domain;
 418
 419     /* Build envelope sender address. Make sure it doesn't contain
 420      * spaces or other "weird" chars that would allow a user to
 421      * exploit the shell/pipe it is used in.
 422      */
 423     $envelopefrom = "$popuser@$domain";
 424     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 425     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 426     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 427
 428     /* open pipe to sendmail or qmail-inject (qmail-inject doesn't accept -t param) */
 429     if (strstr($sendmail_path, "qmail-inject")) {
 430         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 431     } else {
 432         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 433     }
 434
 435     $headerlength = write822Header ($fp, $t, $c, $b, $subject, $MDN, $more_headers);
 436     $bodylength = writeBody($fp, $body);
 437
 438     pclose($fp);
 439
 440     return ($headerlength + $bodylength);
 441 }
 442
 443 function smtpReadData($smtpConnection) {
 444     $read = fgets($smtpConnection, 1024);
 445     $counter = 0;
 446     while ($read) {
 447         echo $read . '<BR>';
 448         $data[$counter] = $read;
 449         $read = fgets($smtpConnection, 1024);
 450         $counter++;
 451     }
 452 }
 453
 454 function sendSMTP($t, $c, $b, $subject, $body, $MDN, $more_headers) {
 455     global $username, $popuser, $domain, $version, $smtpServerAddress,
 456         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 457         $key, $onetimepad;
 458
 459     $to = expandRcptAddrs(parseAddrs($t));
 460     $cc = expandRcptAddrs(parseAddrs($c));
 461     $bcc = expandRcptAddrs(parseAddrs($b));
 462     if (isset($identity) && $identity != 'default') {
 463         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 464     }
 465     else {
 466         $from_addr = getPref($data_dir, $username, 'email_address');
 467     }
 468
 469     if (!$from_addr) {
 470         $from_addr = "$popuser@$domain";
 471     }
 472
 473     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 474     if (!$smtpConnection) {
 475         echo 'Error connecting to SMTP Server.<br>';
 476         echo "$errorNumber : $errorString<br>";
 477         exit;
 478     }
 479     $tmp = fgets($smtpConnection, 1024);
 480     if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 481
 482     $to_list = getLineOfAddrs($to);
 483     $cc_list = getLineOfAddrs($cc);
 484
 485     /* Lets introduce ourselves */
 486     if (! isset ($use_authenticated_smtp) || $use_authenticated_smtp == false) {
 487         fputs($smtpConnection, "HELO $domain\r\n");
 488         $tmp = fgets($smtpConnection, 1024);
 489         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 490     } else {
 491         fputs($smtpConnection, "EHLO $domain\r\n");
 492         $tmp = fgets($smtpConnection, 1024);
 493         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 494
 495         fputs($smtpConnection, "AUTH LOGIN\r\n");
 496         $tmp = fgets($smtpConnection, 1024);
 497         if (errorCheck($tmp, $smtpConnection)!=5) {
 498             return(0);
 499         }
 500
 501         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 502         $tmp = fgets($smtpConnection, 1024);
 503         if (errorCheck($tmp, $smtpConnection)!=5) {
 504             return(0);
 505         }
 506
 507         fputs($smtpConnection, base64_encode (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 508         $tmp = fgets($smtpConnection, 1024);
 509         if (errorCheck($tmp, $smtpConnection)!=5) {
 510             return(0);
 511         }
 512     }
 513
 514     /* Ok, who is sending the message? */
 515     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 516     $tmp = fgets($smtpConnection, 1024);
 517     if (errorCheck($tmp, $smtpConnection)!=5) {
 518         return(0);
 519     }
 520
 521     /* send who the recipients are */
 522     for ($i = 0; $i < count($to); $i++) {
 523         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 524         $tmp = fgets($smtpConnection, 1024);
 525         if (errorCheck($tmp, $smtpConnection)!=5) {
 526             return(0);
 527         }
 528     }
 529     for ($i = 0; $i < count($cc); $i++) {
 530         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 531         $tmp = fgets($smtpConnection, 1024);
 532         if (errorCheck($tmp, $smtpConnection)!=5) {
 533             return(0);
 534         }
 535     }
 536     for ($i = 0; $i < count($bcc); $i++) {
 537         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 538         $tmp = fgets($smtpConnection, 1024);
 539         if (errorCheck($tmp, $smtpConnection)!=5) {
 540             return(0);
 541         }
 542     }
 543
 544     /* Lets start sending the actual message */
 545     fputs($smtpConnection, "DATA\r\n");
 546     $tmp = fgets($smtpConnection, 1024);
 547     if (errorCheck($tmp, $smtpConnection)!=5) {
 548         return(0);
 549     }
 550
 551     /* Send the message */
 552     $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $MDN, $more_headers);
 553     $bodylength = writeBody($smtpConnection, $body);
 554
 555     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 556     $tmp = fgets($smtpConnection, 1024);
 557     $num = errorCheck($tmp, $smtpConnection, true);
 558     if ($num != 250) {
 559         $tmp = nl2br(htmlspecialchars($tmp));
 560         displayPageHeader($color, 'None');
 561         include_once('../functions/display_messages.php');
 562         $msg  = "Message not sent!<br>\nReason given: $tmp";
 563         plain_error_message($msg, $color);
 564         return(0);
 565     }
 566
 567     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 568
 569     fclose($smtpConnection);
 570
 571     return ($headerlength + $bodylength);
 572 }
 573
 574
 575 function errorCheck($line, $smtpConnection, $verbose = false) {
 576     global $color;
 577
 578     /* Read new lines on a multiline response */
 579     $lines = $line;
 580     while(ereg("^[0-9]+-", $line)) {
 581         $line = fgets($smtpConnection, 1024);
 582         $lines .= $line;
 583     }
 584
 585     /* Status:  0 = fatal
 586      *          5 = ok
 587      */
 588     $err_num = substr($line, 0, strpos($line, " "));
 589     switch ($err_num) {
 590     case 500:   $message = 'Syntax error; command not recognized';
 591         $status = 0;
 592         break;
 593     case 501:   $message = 'Syntax error in parameters or arguments';
 594         $status = 0;
 595         break;
 596     case 502:   $message = 'Command not implemented';
 597         $status = 0;
 598         break;
 599     case 503:   $message = 'Bad sequence of commands';
 600         $status = 0;
 601         break;
 602     case 504:   $message = 'Command parameter not implemented';
 603         $status = 0;
 604         break;
 605
 606     case 211:   $message = 'System status, or system help reply';
 607         $status = 5;
 608         break;
 609     case 214:   $message = 'Help message';
 610         $status = 5;
 611         break;
 612
 613     case 220:   $message = 'Service ready';
 614         $status = 5;
 615         break;
 616     case 221:   $message = 'Service closing transmission channel';
 617         $status = 5;
 618         break;
 619
 620     case 421:   $message = 'Service not available, closing chanel';
 621         $status = 0;
 622         break;
 623
 624     case 235:   return(5);
 625         break;
 626     case 250:   $message = 'Requested mail action okay, completed';
 627         $status = 5;
 628         break;
 629     case 251:   $message = 'User not local; will forward';
 630         $status = 5;
 631         break;
 632     case 334:   return(5); break;
 633     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 634         $status = 0;
 635         break;
 636     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 637         $status = 0;
 638         break;
 639     case 451:   $message = 'Requested action aborted:  error in processing';
 640         $status = 0;
 641         break;
 642     case 551:   $message = 'User not local; please try forwarding';
 643         $status = 0;
 644         break;
 645     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 646         $status = 0;
 647         break;
 648     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 649         $status = 0;
 650         break;
 651     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 652         $status = 0;
 653         break;
 654     case 354:   $message = 'Start mail input; end with .';
 655         $status = 5;
 656         break;
 657     case 554:   $message = 'Transaction failed';
 658         $status = 0;
 659         break;
 660     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 661         $status = 0;
 662         $error_num = '001';
 663         break;
 664     }
 665
 666     if ($status == 0) {
 667         include_once('../functions/page_header.php');
 668         displayPageHeader($color, 'None');
 669         include_once('../functions/display_messages.php');
 670         $lines = nl2br(htmlspecialchars($lines));
 671         $msg  = $message . "<br>\nServer replied: $lines";
 672         plain_error_message($msg, $color);
 673     }
 674     if (! $verbose) return $status;
 675     return $err_num;
 676 }
 677
 678 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN, $prio = 3) {
 679     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 680            $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress, $imapPort,
 681            $default_use_priority,
 682            $more_headers,
 683            $request_mdn;
 684
 685     $more_headers = Array();
 686
 687     do_hook('smtp_send');
 688
 689     $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 690
 691     if (isset($reply_id) && $reply_id) {
 692         sqimap_mailbox_select ($imap_stream, $mailbox);
 693         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 694
 695         /* Insert In-Reply-To and References headers if the
 696          * message-id of the message we reply to is set (longer than "<>")
 697          * The References header should really be the old Referenced header
 698          * with the message ID appended, but it can be only the message ID too.
 699          */
 700         $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 701         if(strlen($hdr->message_id) > 2) {
 702             $more_headers['In-Reply-To'] = $hdr->message_id;
 703             $more_headers['References']  = $hdr->message_id;
 704         }
 705     }
 706     if ($default_use_priority) {
 707         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 708     }
 709
 710     /* In order to remove the problem of users not able to create
 711      * messages with "." on a blank line, RFC821 has made provision
 712      * in section 4.5.2 (Transparency).
 713      */
 714     $body = ereg_replace("\n\\.", "\n..", $body);
 715     $body = ereg_replace("^\\.", "..", $body);
 716
 717     /* this is to catch all plain \n instances and
 718      * replace them with \r\n.  All newlines were converted
 719      * into just \n inside the compose.php file.
 720      */
 721     $body = ereg_replace("\n", "\r\n", $body);
 722
 723     if ($useSendmail) {
 724         $length = sendSendmail($t, $c, $b, $subject, $body, $MDN, $more_headers);
 725     } else {
 726         $length = sendSMTP($t, $c, $b, $subject, $body, $MDN, $more_headers);
 727     }
 728     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 729         sqimap_append ($imap_stream, $sent_folder, $length);
 730         write822Header ($imap_stream, $t, $c, $b, $subject, $MDN, $more_headers);
 731         writeBody ($imap_stream, $body);
 732         sqimap_append_done ($imap_stream);
 733     }
 734     sqimap_logout($imap_stream);
 735     /* Delete the files uploaded for attaching (if any).
 736      * only if $length != 0 (if there was no error)
 737      */
 738     if ($length) {
 739         ClearAttachments();
 740     }
 741
 742     return $length;
 743 }
 744
 745 function createPriorityHeaders($prio) {
 746     $prio_headers = Array();
 747     $prio_headers['X-Priority'] = $prio;
 748
 749     switch($prio) {
 750     case 1: $prio_headers['Importance'] = 'High';
 751         $prio_headers['X-MSMail-Priority'] = 'High';
 752         break;
 753
 754     case 3: $prio_headers['Importance'] = 'Normal';
 755         $prio_headers['X-MSMail-Priority'] = 'Normal';
 756         break;
 757
 758     case 5:
 759         $prio_headers['Importance'] = 'Low';
 760         $prio_headers['X-MSMail-Priority'] = 'Low';
 761         break;
 762     }
 763     return  $prio_headers;
 764 }
 765
 766 ?>