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($filetype, 0, 5) == 'text/' ||
 146                 substr($filetype, 0, 8) == 'message/' ) {
 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, $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
 240     /* Storing the header to make sure the header is the same
 241      * everytime the header is printed.
 242      */
 243     static $header, $headerlength;
 244
 245     if ($header == '') {
 246         $to = expandAddrs(parseAddrs($t));
 247         $cc = expandAddrs(parseAddrs($c));
 248         $bcc = expandAddrs(parseAddrs($b));
 249         if (isset($identity) && $identity != 'default') {
 250             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 251             $from = getPref($data_dir, $username, 'full_name' . $identity);
 252             $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 253         } else {
 254             $reply_to = getPref($data_dir, $username, 'reply_to');
 255             $from = getPref($data_dir, $username, 'full_name');
 256             $from_addr = getPref($data_dir, $username, 'email_address');
 257         }
 258
 259         if ($from_addr == '') {
 260             $from_addr = $popuser.'@'.$domain;
 261         }
 262
 263         $to_list = getLineOfAddrs($to);
 264         $cc_list = getLineOfAddrs($cc);
 265         $bcc_list = getLineOfAddrs($bcc);
 266
 267         /* Encoding 8-bit characters and making from line */
 268         $subject = encodeHeader($subject);
 269         if ($from == '') {
 270             $from = "<$from_addr>";
 271         }
 272         else {
 273             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 274         }
 275
 276         /* This creates an RFC 822 date */
 277         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 278
 279         /* Create a message-id */
 280         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 281         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 282
 283         /* Make an RFC822 Received: line */
 284         if (isset($REMOTE_HOST)) {
 285             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 286         }
 287         else {
 288             $received_from = $REMOTE_ADDR;
 289         }
 290
 291         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 292             if ($HTTP_X_FORWARDED_FOR == '') {
 293                 $HTTP_X_FORWARDED_FOR = 'unknown';
 294             }
 295             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 296         }
 297
 298         $header  = "Received: from $received_from\r\n";
 299         $header .= "        (SquirrelMail authenticated user $username)\r\n";
 300         $header .= "        by $SERVER_NAME with HTTP;\r\n";
 301         $header .= "        $date\r\n";
 302
 303         /* Insert the rest of the header fields */
 304         $header .= "Message-ID: $message_id\r\n";
 305         $header .= "Date: $date\r\n";
 306         $header .= "Subject: $subject\r\n";
 307         $header .= "From: $from\r\n";
 308         $header .= "To: $to_list\r\n";    // Who it's TO
 309
 310         if (isset($more_headers["Content-Type"])) {
 311           $contentType = $more_headers["Content-Type"];
 312           unset($more_headers["Content-Type"]);
 313         }
 314         else {
 315           if (isMultipart()) {
 316             $contentType = "multipart/mixed;";
 317           }
 318           else {
 319             if ($default_charset != '') {
 320                 $contentType = 'text/plain; charset='.$default_charset;
 321             }
 322             else {
 323                 $contentType = 'text/plain;';
 324             }
 325           }
 326         }
 327
 328         /* Insert headers from the $more_headers array */
 329         if(is_array($more_headers)) {
 330             reset($more_headers);
 331             while(list($h_name, $h_val) = each($more_headers)) {
 332                 $header .= sprintf("%s: %s\r\n", $h_name, $h_val);
 333             }
 334         }
 335
 336         if ($cc_list) {
 337             $header .= "Cc: $cc_list\r\n"; // Who the CCs are
 338         }
 339
 340         if ($reply_to != '') {
 341             $header .= "Reply-To: $reply_to\r\n";
 342         }
 343
 344         if ($useSendmail) {
 345             if ($bcc_list) {
 346                 // BCCs is removed from header by sendmail
 347                 $header .= "Bcc: $bcc_list\r\n";
 348             }
 349         }
 350
 351         $header .= "X-Mailer: SquirrelMail (version $version)\r\n"; /* Identify SquirrelMail */
 352
 353         /* Do the MIME-stuff */
 354         $header .= "MIME-Version: 1.0\r\n";
 355
 356         if (isMultipart()) {
 357             $header .= 'Content-Type: '.$contentType.' boundary="';
 358             $header .= mimeBoundary();
 359             $header .= "\"\r\n";
 360         } else {
 361             $header .= 'Content-Type: '.$contentType."\r\n";
 362             $header .= "Content-Transfer-Encoding: 8bit\r\n";
 363         }
 364         $header .= "\r\n"; // One blank line to separate header and body
 365
 366         $headerlength = strlen($header);
 367     }
 368
 369     /* Write the header */
 370     fputs ($fp, $header);
 371
 372     return $headerlength;
 373 }
 374
 375 /* Send the body
 376  */
 377 function writeBody ($fp, $passedBody) {
 378     global $default_charset;
 379
 380     $attachmentlength = 0;
 381
 382     if (isMultipart()) {
 383         $body = '--'.mimeBoundary()."\r\n";
 384
 385         if ($default_charset != "") {
 386             $body .= "Content-Type: text/plain; charset=$default_charset\r\n";
 387         }
 388         else {
 389             $body .= "Content-Type: text/plain\r\n";
 390         }
 391
 392         $body .= "Content-Transfer-Encoding: 8bit\r\n\r\n";
 393         $body .= $passedBody . "\r\n\r\n";
 394         fputs ($fp, $body);
 395
 396         $attachmentlength = attachFiles($fp);
 397
 398         if (!isset($postbody)) {
 399             $postbody = "";
 400         }
 401         $postbody .= "\r\n--".mimeBoundary()."--\r\n\r\n";
 402         fputs ($fp, $postbody);
 403     } else {
 404         $body = $passedBody . "\r\n";
 405         fputs ($fp, $body);
 406         $postbody = "\r\n";
 407         fputs ($fp, $postbody);
 408     }
 409
 410     return (strlen($body) + strlen($postbody) + $attachmentlength);
 411 }
 412
 413 /* Send mail using the sendmail command
 414  */
 415 function sendSendmail($t, $c, $b, $subject, $body, $more_headers) {
 416     global $sendmail_path, $popuser, $username, $domain;
 417
 418     /* Build envelope sender address. Make sure it doesn't contain
 419      * spaces or other "weird" chars that would allow a user to
 420      * exploit the shell/pipe it is used in.
 421      */
 422     $envelopefrom = "$popuser@$domain";
 423     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 424     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 425     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 426
 427     /* open pipe to sendmail or qmail-inject (qmail-inject doesn't accept -t param) */
 428     if (strstr($sendmail_path, "qmail-inject")) {
 429         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 430     } else {
 431         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 432     }
 433
 434     $headerlength = write822Header ($fp, $t, $c, $b, $subject, $more_headers);
 435     $bodylength = writeBody($fp, $body);
 436
 437     pclose($fp);
 438
 439     return ($headerlength + $bodylength);
 440 }
 441
 442 function smtpReadData($smtpConnection) {
 443     $read = fgets($smtpConnection, 1024);
 444     $counter = 0;
 445     while ($read) {
 446         echo $read . '<BR>';
 447         $data[$counter] = $read;
 448         $read = fgets($smtpConnection, 1024);
 449         $counter++;
 450     }
 451 }
 452
 453 function sendSMTP($t, $c, $b, $subject, $body, $more_headers) {
 454     global $username, $popuser, $domain, $version, $smtpServerAddress,
 455         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 456         $key, $onetimepad;
 457
 458     $to = expandRcptAddrs(parseAddrs($t));
 459     $cc = expandRcptAddrs(parseAddrs($c));
 460     $bcc = expandRcptAddrs(parseAddrs($b));
 461     if (isset($identity) && $identity != 'default') {
 462         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 463     }
 464     else {
 465         $from_addr = getPref($data_dir, $username, 'email_address');
 466     }
 467
 468     if (!$from_addr) {
 469         $from_addr = "$popuser@$domain";
 470     }
 471
 472     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort, $errorNumber, $errorString);
 473     if (!$smtpConnection) {
 474         echo 'Error connecting to SMTP Server.<br>';
 475         echo "$errorNumber : $errorString<br>";
 476         exit;
 477     }
 478     $tmp = fgets($smtpConnection, 1024);
 479     if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 480
 481     $to_list = getLineOfAddrs($to);
 482     $cc_list = getLineOfAddrs($cc);
 483
 484     /* Lets introduce ourselves */
 485     if (! isset ($use_authenticated_smtp) || $use_authenticated_smtp == false) {
 486         fputs($smtpConnection, "HELO $domain\r\n");
 487         $tmp = fgets($smtpConnection, 1024);
 488         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 489     } else {
 490         fputs($smtpConnection, "EHLO $domain\r\n");
 491         $tmp = fgets($smtpConnection, 1024);
 492         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 493
 494         fputs($smtpConnection, "AUTH LOGIN\r\n");
 495         $tmp = fgets($smtpConnection, 1024);
 496         if (errorCheck($tmp, $smtpConnection)!=5) {
 497             return(0);
 498         }
 499
 500         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 501         $tmp = fgets($smtpConnection, 1024);
 502         if (errorCheck($tmp, $smtpConnection)!=5) {
 503             return(0);
 504         }
 505
 506         fputs($smtpConnection, base64_encode (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 507         $tmp = fgets($smtpConnection, 1024);
 508         if (errorCheck($tmp, $smtpConnection)!=5) {
 509             return(0);
 510         }
 511     }
 512
 513     /* Ok, who is sending the message? */
 514     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 515     $tmp = fgets($smtpConnection, 1024);
 516     if (errorCheck($tmp, $smtpConnection)!=5) {
 517         return(0);
 518     }
 519
 520     /* send who the recipients are */
 521     for ($i = 0; $i < count($to); $i++) {
 522         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 523         $tmp = fgets($smtpConnection, 1024);
 524         if (errorCheck($tmp, $smtpConnection)!=5) {
 525             return(0);
 526         }
 527     }
 528     for ($i = 0; $i < count($cc); $i++) {
 529         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 530         $tmp = fgets($smtpConnection, 1024);
 531         if (errorCheck($tmp, $smtpConnection)!=5) {
 532             return(0);
 533         }
 534     }
 535     for ($i = 0; $i < count($bcc); $i++) {
 536         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 537         $tmp = fgets($smtpConnection, 1024);
 538         if (errorCheck($tmp, $smtpConnection)!=5) {
 539             return(0);
 540         }
 541     }
 542
 543     /* Lets start sending the actual message */
 544     fputs($smtpConnection, "DATA\r\n");
 545     $tmp = fgets($smtpConnection, 1024);
 546     if (errorCheck($tmp, $smtpConnection)!=5) {
 547         return(0);
 548     }
 549
 550     /* Send the message */
 551     $headerlength = write822Header ($smtpConnection, $t, $c, $b, $subject, $more_headers);
 552     $bodylength = writeBody($smtpConnection, $body);
 553
 554     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 555     $tmp = fgets($smtpConnection, 1024);
 556     $num = errorCheck($tmp, $smtpConnection, true);
 557     if ($num != 250) {
 558         $tmp = nl2br(htmlspecialchars($tmp));
 559         displayPageHeader($color, 'None');
 560         include_once('../functions/display_messages.php');
 561         $msg  = "Message not sent!<br>\nReason given: $tmp";
 562         plain_error_message($msg, $color);
 563         return(0);
 564     }
 565
 566     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 567
 568     fclose($smtpConnection);
 569
 570     return ($headerlength + $bodylength);
 571 }
 572
 573
 574 function errorCheck($line, $smtpConnection, $verbose = false) {
 575     global $color;
 576
 577     /* Read new lines on a multiline response */
 578     $lines = $line;
 579     while(ereg("^[0-9]+-", $line)) {
 580         $line = fgets($smtpConnection, 1024);
 581         $lines .= $line;
 582     }
 583
 584     /* Status:  0 = fatal
 585      *          5 = ok
 586      */
 587     $err_num = substr($line, 0, strpos($line, " "));
 588     switch ($err_num) {
 589     case 500:   $message = 'Syntax error; command not recognized';
 590         $status = 0;
 591         break;
 592     case 501:   $message = 'Syntax error in parameters or arguments';
 593         $status = 0;
 594         break;
 595     case 502:   $message = 'Command not implemented';
 596         $status = 0;
 597         break;
 598     case 503:   $message = 'Bad sequence of commands';
 599         $status = 0;
 600         break;
 601     case 504:   $message = 'Command parameter not implemented';
 602         $status = 0;
 603         break;
 604
 605     case 211:   $message = 'System status, or system help reply';
 606         $status = 5;
 607         break;
 608     case 214:   $message = 'Help message';
 609         $status = 5;
 610         break;
 611
 612     case 220:   $message = 'Service ready';
 613         $status = 5;
 614         break;
 615     case 221:   $message = 'Service closing transmission channel';
 616         $status = 5;
 617         break;
 618
 619     case 421:   $message = 'Service not available, closing chanel';
 620         $status = 0;
 621         break;
 622
 623     case 235:   return(5);
 624         break;
 625     case 250:   $message = 'Requested mail action okay, completed';
 626         $status = 5;
 627         break;
 628     case 251:   $message = 'User not local; will forward';
 629         $status = 5;
 630         break;
 631     case 334:   return(5); break;
 632     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 633         $status = 0;
 634         break;
 635     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 636         $status = 0;
 637         break;
 638     case 451:   $message = 'Requested action aborted:  error in processing';
 639         $status = 0;
 640         break;
 641     case 551:   $message = 'User not local; please try forwarding';
 642         $status = 0;
 643         break;
 644     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 645         $status = 0;
 646         break;
 647     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 648         $status = 0;
 649         break;
 650     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 651         $status = 0;
 652         break;
 653     case 354:   $message = 'Start mail input; end with .';
 654         $status = 5;
 655         break;
 656     case 554:   $message = 'Transaction failed';
 657         $status = 0;
 658         break;
 659     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 660         $status = 0;
 661         $error_num = '001';
 662         break;
 663     }
 664
 665     if ($status == 0) {
 666         include_once('../functions/page_header.php');
 667         displayPageHeader($color, 'None');
 668         include_once('../functions/display_messages.php');
 669         $lines = nl2br(htmlspecialchars($lines));
 670         $msg  = $message . "<br>\nServer replied: $lines";
 671         plain_error_message($msg, $color);
 672     }
 673     if (! $verbose) return $status;
 674     return $err_num;
 675 }
 676
 677 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN, $prio = 3) {
 678     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 679            $data_dir, $username, $domain, $key, $version, $sent_folder, $imapServerAddress,
 680            $imapPort, $default_use_priority, $more_headers, $request_mdn, $request_dr;
 681
 682     $more_headers = Array();
 683
 684     do_hook('smtp_send');
 685
 686     $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 1);
 687
 688     if (isset($reply_id) && $reply_id) {
 689         sqimap_mailbox_select ($imap_stream, $mailbox);
 690         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 691
 692         /* Insert In-Reply-To and References headers if the
 693          * message-id of the message we reply to is set (longer than "<>")
 694          * The References header should really be the old Referenced header
 695          * with the message ID appended, but it can be only the message ID too.
 696          */
 697         $hdr = sqimap_get_small_header ($imap_stream, $reply_id, false);
 698         if(strlen($hdr->message_id) > 2) {
 699             $more_headers['In-Reply-To'] = $hdr->message_id;
 700             $more_headers['References']  = $hdr->message_id;
 701         }
 702     }
 703     if ($default_use_priority) {
 704         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 705     }
 706
 707     $requestRecipt = 0;
 708     if (isset($request_dr)) {
 709         $requestRecipt += 1;
 710     }
 711     if (isset($request_mdn)) {
 712         $requestRecipt += 2;
 713     }
 714     if ( $requestRecipt > 0) {
 715         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 716     }
 717
 718     /* In order to remove the problem of users not able to create
 719      * messages with "." on a blank line, RFC821 has made provision
 720      * in section 4.5.2 (Transparency).
 721      */
 722     $body = ereg_replace("\n\\.", "\n..", $body);
 723     $body = ereg_replace("^\\.", "..", $body);
 724
 725     /* this is to catch all plain \n instances and
 726      * replace them with \r\n.  All newlines were converted
 727      * into just \n inside the compose.php file.
 728      */
 729     $body = ereg_replace("\n", "\r\n", $body);
 730
 731     if ($MDN) {
 732         $more_headers["Content-Type"] = "multipart/report; ".
 733             "report-type=disposition-notification;";
 734     }
 735
 736     if ($useSendmail) {
 737         $length = sendSendmail($t, $c, $b, $subject, $body,  $more_headers);
 738     } else {
 739         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers);
 740     }
 741     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 742         sqimap_append ($imap_stream, $sent_folder, $length);
 743         write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers);
 744         writeBody ($imap_stream, $body);
 745         sqimap_append_done ($imap_stream);
 746     }
 747     sqimap_logout($imap_stream);
 748     /* Delete the files uploaded for attaching (if any).
 749      * only if $length != 0 (if there was no error)
 750      */
 751     if ($length) {
 752         ClearAttachments();
 753     }
 754
 755     return $length;
 756 }
 757
 758 function createPriorityHeaders($prio) {
 759     $prio_headers = Array();
 760     $prio_headers['X-Priority'] = $prio;
 761
 762     switch($prio) {
 763     case 1: $prio_headers['Importance'] = 'High';
 764         $prio_headers['X-MSMail-Priority'] = 'High';
 765         break;
 766
 767     case 3: $prio_headers['Importance'] = 'Normal';
 768         $prio_headers['X-MSMail-Priority'] = 'Normal';
 769         break;
 770
 771     case 5:
 772         $prio_headers['Importance'] = 'Low';
 773         $prio_headers['X-MSMail-Priority'] = 'Low';
 774         break;
 775     }
 776     return  $prio_headers;
 777 }
 778
 779 function createReceiptHeaders($receipt) {
 780
 781     GLOBAL $data_dir, $username;
 782
 783     $receipt_headers = Array();
 784     $from_addr = getPref($data_dir, $username, 'email_address');
 785     $from = getPref($data_dir, $username, 'full_name');
 786
 787     if ($from == '') {
 788         $from = "<$from_addr>";
 789     }
 790     else {
 791         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 792     }
 793
 794     /* On Delivery */
 795     if ( $receipt == 1
 796         || $receipt == 3 ) {
 797         $receipt_headers["Return-Receipt-To"] = $from;
 798     }
 799     /* On Read */
 800     if ($receipt == 2
 801         || $receipt == 3 ) {
 802         /* Pegasus Mail */
 803         $receipt_headers["X-Confirm-Reading-To"] = $from;
 804         /* RFC 2298 */
 805         $receipt_headers["Disposition-Notification-To"] = $from;
 806     }
 807     return $receipt_headers;
 808 }
 809
 810
 811 ?>