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 /**
  35  * Return which separator we should be using.
  36  * \r\n for SMTP delivery, just \n for Sendmail.
  37  */
  38 function sqm_nrn(){
  39     global $useSendmail;
  40     if ($useSendmail){
  41         return "\n";
  42     } else {
  43         return "\r\n";
  44     }
  45 }
  46
  47
  48 /* Returns true only if this message is multipart */
  49 function isMultipart ($session) {
  50     global $attachments;
  51
  52     foreach ($attachments as $info) {
  53         if ($info['session'] == $session) {
  54             return true;
  55         }
  56     }
  57     return false;
  58 }
  59
  60 /* looks up aliases in the addressbook and expands them to
  61  * the full address.
  62  *
  63  * Adds @$domain if it wasn't in the address book and if it
  64  * doesn't have an @ symbol in it
  65  */
  66 function expandAddrs ($array) {
  67     global $domain;
  68
  69     /* don't show errors -- kinda critical that we don't see
  70      * them here since the redirect won't work if we do show them
  71      */
  72     $abook = addressbook_init(false, true);
  73     for ($i=0; $i < count($array); $i++) {
  74         $result = $abook->lookup($array[$i]);
  75         $ret = "";
  76         if (isset($result['email'])) {
  77             if (isset($result['name'])) {
  78                 $ret = '"'.$result['name'].'" ';
  79             }
  80             $ret .= '<'.$result['email'].'>';
  81             $array[$i] = $ret;
  82         }
  83         else
  84         {
  85             if (strpos($array[$i], '@') === false) {
  86                 $array[$i] .= '@' . $domain;
  87             }
  88             $array[$i] = '<' . $array[$i] . '>';
  89         }
  90     }
  91     return $array;
  92 }
  93
  94
  95 /* looks up aliases in the addressbook and expands them to
  96  * the RFC 821 valid RCPT address. ie <user@example.com>
  97  * Adds @$domain if it wasn't in the address book and if it
  98  * doesn't have an @ symbol in it
  99  */
 100 function expandRcptAddrs ($array) {
 101     global $domain;
 102
 103     /* don't show errors -- kinda critical that we don't see
 104      * them here since the redirect won't work if we do show them
 105      */
 106     $abook = addressbook_init(false, true);
 107     for ($i=0; $i < count($array); $i++) {
 108         $result = $abook->lookup($array[$i]);
 109         $ret = "";
 110         if (isset($result['email'])) {
 111             $ret = '<'.$result['email'].'>';
 112             $array[$i] = $ret;
 113         }
 114         else {
 115             if (strpos($array[$i], '@') === false) {
 116                 $array[$i] .= '@' . $domain;
 117             }
 118             $array[$i] = '<' . $array[$i] . '>';
 119         }
 120     }
 121     return $array;
 122 }
 123
 124
 125 /* Attach the files that are due to be attached
 126  */
 127 function attachFiles ($fp, $session) {
 128     global $attachments, $attachment_dir, $username;
 129
 130     $length = 0;
 131     $rn = sqm_nrn();
 132
 133     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 134     if (isMultipart($session)) {
 135         foreach ($attachments as $info) {
 136             if ($info['session'] == $session) {
 137                 if (isset($info['type'])) {
 138                     $filetype = $info['type'];
 139                 }
 140                 else {
 141                     $filetype = 'application/octet-stream';
 142                 }
 143
 144                 $header = '--' . mimeBoundary() . "$rn";
 145                 if ( isset($info['remotefilename'])
 146                      && $info['remotefilename'] != '') {
 147                     $header .= "Content-Type: $filetype; name=\"" .
 148                         $info['remotefilename'] . "\"$rn";
 149                     $header .= "Content-Disposition: attachment; filename=\""
 150                         . $info['remotefilename'] . "\"$rn";
 151                 } else {
 152                     $header .= "Content-Type: $filetype$rn";
 153                 }
 154
 155
 156                 /* Use 'rb' for NT systems -- read binary
 157                  * Unix doesn't care -- everything's binary!  :-)
 158                  */
 159
 160                 $filename = $hashed_attachment_dir . '/'
 161                     . $info['localfilename'];
 162                 $file = fopen ($filename, 'rb');
 163                 if (substr($filetype, 0, 5) == 'text/' ||
 164                     substr($filetype, 0, 8) == 'message/' ) {
 165                     $header .= "$rn";
 166                     fputs ($fp, $header);
 167                     $length += strlen($header);
 168                     while ($tmp = fgets($file, 4096)) {
 169                         $tmp = str_replace("\r\n", "\n", $tmp);
 170                         $tmp = str_replace("\r", "\n", $tmp);
 171                         if ($rn == "\r\n"){
 172                             $tmp = str_replace("\n", "\r\n", $tmp);
 173                         }
 174                         /**
 175                          * Check if the last line has newline ($rn) in it
 176                          * and append if it doesn't.
 177                          */
 178                         if (feof($fp) && !strstr($tmp, "$rn")){
 179                             $tmp .= "$rn";
 180                         }
 181                         fputs($fp, $tmp);
 182                         $length += strlen($tmp);
 183                     }
 184                 } else {
 185                     $header .= "Content-Transfer-Encoding: base64"
 186                         . "$rn" . "$rn";
 187                     fputs ($fp, $header);
 188                     $length += strlen($header);
 189                     while ($tmp = fread($file, 570)) {
 190                         $encoded = chunk_split(base64_encode($tmp));
 191                         $length += strlen($encoded);
 192                         fputs ($fp, $encoded);
 193                     }
 194                 }
 195                 fclose ($file);
 196             }
 197         }
 198     }
 199     return $length;
 200 }
 201
 202 /* Delete files that are uploaded for attaching
 203  */
 204 function deleteAttachments($session) {
 205     global $username, $attachments, $attachment_dir;
 206     $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
 207
 208     $rem_attachments = array();
 209     foreach ($attachments as $info) {
 210         if ($info['session'] == $session) {
 211             $attached_file = "$hashed_attachment_dir/$info[localfilename]";
 212             if (file_exists($attached_file)) {
 213                 unlink($attached_file);
 214             }
 215         } else {
 216             $rem_attachments[] = $info;
 217         }
 218     }
 219     $attachments = $rem_attachments;
 220 }
 221
 222 /* Return a nice MIME-boundary
 223  */
 224 function mimeBoundary () {
 225     static $mimeBoundaryString;
 226
 227     if ( !isset( $mimeBoundaryString ) ||
 228          $mimeBoundaryString == '') {
 229         $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
 230             mt_rand( 10000, 99999 );
 231     }
 232
 233     return $mimeBoundaryString;
 234 }
 235
 236 /* Time offset for correct timezone */
 237 function timezone () {
 238     global $invert_time;
 239
 240     $diff_second = date('Z');
 241     if ($invert_time) {
 242         $diff_second = - $diff_second;
 243     }
 244     if ($diff_second > 0) {
 245         $sign = '+';
 246     }
 247     else {
 248         $sign = '-';
 249     }
 250
 251     $diff_second = abs($diff_second);
 252
 253     $diff_hour = floor ($diff_second / 3600);
 254     $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
 255
 256     $zonename = '('.strftime('%Z').')';
 257     $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
 258                        $zonename);
 259     return ($result);
 260 }
 261
 262 /* Print all the needed RFC822 headers */
 263 function write822Header ($fp, $t, $c, $b, $subject, $more_headers, $session) {
 264     global $REMOTE_ADDR, $SERVER_NAME, $REMOTE_PORT;
 265     global $data_dir, $username, $popuser, $domain, $version, $useSendmail;
 266     global $default_charset, $HTTP_VIA, $HTTP_X_FORWARDED_FOR;
 267     global $REMOTE_HOST, $identity;
 268     /**
 269      * Get which delimiter we are going to use.
 270      */
 271     $rn = sqm_nrn();
 272     /* Storing the header to make sure the header is the same
 273      * everytime the header is printed.
 274      */
 275     static $header, $headerlength;
 276
 277     if ($header == '') {
 278         $to = expandAddrs(parseAddrs($t));
 279         $cc = expandAddrs(parseAddrs($c));
 280         $bcc = expandAddrs(parseAddrs($b));
 281         if (isset($identity) && $identity != 'default') {
 282             $reply_to = getPref($data_dir, $username, 'reply_to' . $identity);
 283             $from = getPref($data_dir, $username, 'full_name' . $identity);
 284             $from_addr = getPref($data_dir, $username,
 285                                  'email_address' . $identity);
 286         } else {
 287             $reply_to = getPref($data_dir, $username, 'reply_to');
 288             $from = getPref($data_dir, $username, 'full_name');
 289             $from_addr = getPref($data_dir, $username, 'email_address');
 290         }
 291
 292         if ($from_addr == '') {
 293             $from_addr = $popuser.'@'.$domain;
 294         }
 295
 296         $to_list = getLineOfAddrs($to);
 297         $cc_list = getLineOfAddrs($cc);
 298         $bcc_list = getLineOfAddrs($bcc);
 299
 300         /* Encoding 8-bit characters and making from line */
 301         $subject = encodeHeader($subject);
 302         if ($from == '') {
 303             $from = "<$from_addr>";
 304         }
 305         else {
 306             $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 307         }
 308
 309         /* This creates an RFC 822 date */
 310         $date = date("D, j M Y H:i:s ", mktime()) . timezone();
 311
 312         /* Create a message-id */
 313         $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
 314         $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
 315
 316         /* Make an RFC822 Received: line */
 317         if (isset($REMOTE_HOST)) {
 318             $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
 319         }
 320         else {
 321             $received_from = $REMOTE_ADDR;
 322         }
 323
 324         if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
 325             if ($HTTP_X_FORWARDED_FOR == '') {
 326                 $HTTP_X_FORWARDED_FOR = 'unknown';
 327             }
 328             $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
 329         }
 330
 331         $header  = "Received: from $received_from" . $rn;
 332         $header .= "        (SquirrelMail authenticated user $username)" . $rn;
 333         $header .= "        by $SERVER_NAME with HTTP;" . $rn;
 334         $header .= "        $date" . $rn;
 335
 336         /* Insert the rest of the header fields */
 337         $header .= "Message-ID: $message_id" . $rn;
 338         $header .= "Date: $date" . $rn;
 339         $header .= "Subject: $subject" . $rn;
 340         $header .= "From: $from" . $rn;
 341         $header .= "To: $to_list" . $rn;    // Who it's TO
 342
 343         if (isset($more_headers["Content-Type"])) {
 344             $contentType = $more_headers["Content-Type"];
 345             unset($more_headers["Content-Type"]);
 346         }
 347         else {
 348             if (isMultipart($session)) {
 349                 $contentType = "multipart/mixed;";
 350             }
 351             else {
 352                 if ($default_charset != '') {
 353                     $contentType = 'text/plain; charset='.$default_charset;
 354                 }
 355                 else {
 356                     $contentType = 'text/plain;';
 357                 }
 358             }
 359         }
 360
 361         /* Insert headers from the $more_headers array */
 362         if(is_array($more_headers)) {
 363             reset($more_headers);
 364             while(list($h_name, $h_val) = each($more_headers)) {
 365                 $header .= sprintf("%s: %s%s", $h_name, $h_val, $rn);
 366             }
 367         }
 368
 369         if ($cc_list) {
 370             $header .= "Cc: $cc_list" . $rn; // Who the CCs are
 371         }
 372
 373         if ($reply_to != '') {
 374             $header .= "Reply-To: $reply_to" . $rn;
 375         }
 376
 377         if ($useSendmail) {
 378             if ($bcc_list) {
 379                 // BCCs is removed from header by sendmail
 380                 $header .= "Bcc: $bcc_list" . $rn;
 381             }
 382         }
 383
 384         /* Identify SquirrelMail */
 385         $header .= "X-Mailer: SquirrelMail (version $version)" . $rn;
 386
 387         /* Do the MIME-stuff */
 388         $header .= "MIME-Version: 1.0" . $rn;
 389
 390         if (isMultipart($session)) {
 391             $header .= 'Content-Type: '.$contentType.' boundary="';
 392             $header .= mimeBoundary();
 393             $header .= "\"$rn";
 394         } else {
 395             $header .= 'Content-Type: ' . $contentType . $rn;
 396             $header .= "Content-Transfer-Encoding: 8bit" . $rn;
 397         }
 398         $header .= $rn; // One blank line to separate header and body
 399
 400         $headerlength = strlen($header);
 401     }
 402
 403     /* Write the header */
 404     fputs ($fp, $header);
 405
 406     return $headerlength;
 407 }
 408
 409 /* Send the body
 410  */
 411 function writeBody ($fp, $passedBody, $session) {
 412     global $default_charset;
 413     /**
 414      * Get delimiter.
 415      */
 416     $rn = sqm_nrn();
 417
 418     $attachmentlength = 0;
 419
 420     if (isMultipart($session)) {
 421         $body = '--'.mimeBoundary() . $rn;
 422
 423         if ($default_charset != "") {
 424             $body .= "Content-Type: text/plain; charset=$default_charset".$rn;
 425         }
 426         else {
 427             $body .= "Content-Type: text/plain" . $rn;
 428         }
 429
 430         $body .= "Content-Transfer-Encoding: 8bit" . $rn . $rn;
 431         $body .= $passedBody . $rn . $rn;
 432         fputs ($fp, $body);
 433
 434         $attachmentlength = attachFiles($fp, $session);
 435
 436         if (!isset($postbody)) {
 437             $postbody = "";
 438         }
 439         $postbody .= $rn . "--" . mimeBoundary() . "--" . $rn . $rn;
 440         fputs ($fp, $postbody);
 441     } else {
 442         $body = $passedBody . $rn;
 443         fputs ($fp, $body);
 444         $postbody = $rn;
 445         fputs ($fp, $postbody);
 446     }
 447
 448     return (strlen($body) + strlen($postbody) + $attachmentlength);
 449 }
 450
 451 /* Send mail using the sendmail command
 452  */
 453 function sendSendmail($t, $c, $b, $subject, $body, $more_headers, $session) {
 454     global $sendmail_path, $popuser, $username, $domain;
 455
 456     /* Build envelope sender address. Make sure it doesn't contain
 457      * spaces or other "weird" chars that would allow a user to
 458      * exploit the shell/pipe it is used in.
 459      */
 460     $envelopefrom = "$popuser@$domain";
 461     $envelopefrom = ereg_replace("[[:blank:]]",'', $envelopefrom);
 462     $envelopefrom = ereg_replace("[[:space:]]",'', $envelopefrom);
 463     $envelopefrom = ereg_replace("[[:cntrl:]]",'', $envelopefrom);
 464
 465     /**
 466      * open pipe to sendmail or qmail-inject
 467      * (qmail-inject doesn't accept -t param)
 468      */
 469     if (strstr($sendmail_path, "qmail-inject")) {
 470         $fp = popen (escapeshellcmd("$sendmail_path -f$envelopefrom"), "w");
 471     } else {
 472         $fp = popen (escapeshellcmd("$sendmail_path -t -f$envelopefrom"), "w");
 473     }
 474
 475     $headerlength = write822Header ($fp, $t, $c, $b, $subject,
 476                                     $more_headers, $session);
 477     $bodylength = writeBody($fp, $body, $session);
 478
 479     pclose($fp);
 480
 481     return ($headerlength + $bodylength);
 482 }
 483
 484 function smtpReadData($smtpConnection) {
 485     $read = fgets($smtpConnection, 1024);
 486     $counter = 0;
 487     while ($read) {
 488         echo $read . '<BR>';
 489         $data[$counter] = $read;
 490         $read = fgets($smtpConnection, 1024);
 491         $counter++;
 492     }
 493 }
 494
 495 function sendSMTP($t, $c, $b, $subject, $body, $more_headers, $session) {
 496     global $username, $popuser, $domain, $version, $smtpServerAddress,
 497         $smtpPort, $data_dir, $color, $use_authenticated_smtp, $identity,
 498         $key, $onetimepad;
 499
 500     $to = expandRcptAddrs(parseAddrs($t));
 501     $cc = expandRcptAddrs(parseAddrs($c));
 502     $bcc = expandRcptAddrs(parseAddrs($b));
 503     if (isset($identity) && $identity != 'default') {
 504         $from_addr = getPref($data_dir, $username,
 505                              'email_address' . $identity);
 506     }
 507     else {
 508         $from_addr = getPref($data_dir, $username, 'email_address');
 509     }
 510
 511     if (!$from_addr) {
 512         $from_addr = "$popuser@$domain";
 513     }
 514
 515     /* POP3 BEFORE SMTP CODE HERE */
 516     global $pop_before_smtp;
 517     if (isset($pop_before_smtp) && $pop_before_smtp === true) {
 518         if (!isset($pop_port)) {
 519             $pop_port = 110;
 520         }
 521         if (!isset($pop_server)) {
 522             $pop_server = $smtpServerAddress; /* usually the same host! */
 523         }
 524         $popConnection = fsockopen($pop_server, $pop_port, $err_no, $err_str);
 525         if (!$popConnection) {
 526             error_log("Error connecting to POP Server ($pop_server:$pop_port)"
 527                   . " $err_no : $err_str");
 528         } else {
 529             $tmp = fgets($popConnection, 1024); /* banner */
 530             if (!eregi("^\+OK", $tmp, $regs)) {
 531                 return(0);
 532             }
 533             fputs($popConnection, "USER $username\r\n");
 534             $tmp = fgets($popConnection, 1024);
 535             if (!eregi("^\+OK", $tmp, $regs)) {
 536                 return(0);
 537             }
 538             fputs($popConnection, 'PASS ' . OneTimePadDecrypt($key, $onetimepad) . "\r\n");
 539             $tmp = fgets($popConnection, 1024);
 540             if (!eregi("^\+OK", $tmp, $regs)) {
 541                 return(0);
 542             }
 543             fputs($popConnection, "QUIT\r\n"); /* log off */
 544             fclose($popConnection);
 545         }
 546     }
 547
 548     $smtpConnection = fsockopen($smtpServerAddress, $smtpPort,
 549                                 $errorNumber, $errorString);
 550     if (!$smtpConnection) {
 551         echo 'Error connecting to SMTP Server.<br>';
 552         echo "$errorNumber : $errorString<br>";
 553         exit;
 554     }
 555     $tmp = fgets($smtpConnection, 1024);
 556     if (errorCheck($tmp, $smtpConnection)!=5) {
 557         return(0);
 558     }
 559
 560     $to_list = getLineOfAddrs($to);
 561     $cc_list = getLineOfAddrs($cc);
 562
 563     /* Lets introduce ourselves */
 564     if (! isset ($use_authenticated_smtp)
 565         || $use_authenticated_smtp == false) {
 566         fputs($smtpConnection, "HELO $domain\r\n");
 567         $tmp = fgets($smtpConnection, 1024);
 568         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 569     } else {
 570         fputs($smtpConnection, "EHLO $domain\r\n");
 571         $tmp = fgets($smtpConnection, 1024);
 572         if (errorCheck($tmp, $smtpConnection)!=5) return(0);
 573
 574         fputs($smtpConnection, "AUTH LOGIN\r\n");
 575         $tmp = fgets($smtpConnection, 1024);
 576         if (errorCheck($tmp, $smtpConnection)!=5) {
 577             return(0);
 578         }
 579
 580         fputs($smtpConnection, base64_encode ($username) . "\r\n");
 581         $tmp = fgets($smtpConnection, 1024);
 582         if (errorCheck($tmp, $smtpConnection)!=5) {
 583             return(0);
 584         }
 585
 586         fputs($smtpConnection, base64_encode
 587               (OneTimePadDecrypt($key, $onetimepad)) . "\r\n");
 588         $tmp = fgets($smtpConnection, 1024);
 589         if (errorCheck($tmp, $smtpConnection)!=5) {
 590             return(0);
 591         }
 592     }
 593
 594     /* Ok, who is sending the message? */
 595     fputs($smtpConnection, "MAIL FROM: <$from_addr>\r\n");
 596     $tmp = fgets($smtpConnection, 1024);
 597     if (errorCheck($tmp, $smtpConnection)!=5) {
 598         return(0);
 599     }
 600
 601     /* send who the recipients are */
 602     for ($i = 0; $i < count($to); $i++) {
 603         fputs($smtpConnection, "RCPT TO: $to[$i]\r\n");
 604         $tmp = fgets($smtpConnection, 1024);
 605         if (errorCheck($tmp, $smtpConnection)!=5) {
 606             return(0);
 607         }
 608     }
 609     for ($i = 0; $i < count($cc); $i++) {
 610         fputs($smtpConnection, "RCPT TO: $cc[$i]\r\n");
 611         $tmp = fgets($smtpConnection, 1024);
 612         if (errorCheck($tmp, $smtpConnection)!=5) {
 613             return(0);
 614         }
 615     }
 616     for ($i = 0; $i < count($bcc); $i++) {
 617         fputs($smtpConnection, "RCPT TO: $bcc[$i]\r\n");
 618         $tmp = fgets($smtpConnection, 1024);
 619         if (errorCheck($tmp, $smtpConnection)!=5) {
 620             return(0);
 621         }
 622     }
 623
 624     /* Lets start sending the actual message */
 625     fputs($smtpConnection, "DATA\r\n");
 626     $tmp = fgets($smtpConnection, 1024);
 627     if (errorCheck($tmp, $smtpConnection)!=5) {
 628         return(0);
 629     }
 630
 631     /* Send the message */
 632     $headerlength = write822Header ($smtpConnection, $t, $c, $b,
 633                                     $subject, $more_headers, $session);
 634     $bodylength = writeBody($smtpConnection, $body, $session);
 635
 636     fputs($smtpConnection, ".\r\n"); /* end the DATA part */
 637     $tmp = fgets($smtpConnection, 1024);
 638     $num = errorCheck($tmp, $smtpConnection, true);
 639     if ($num != 250) {
 640         return(0);
 641     }
 642
 643     fputs($smtpConnection, "QUIT\r\n"); /* log off */
 644
 645     fclose($smtpConnection);
 646
 647     return ($headerlength + $bodylength);
 648 }
 649
 650
 651 function errorCheck($line, $smtpConnection, $verbose = false) {
 652     global $color, $compose_new_win;
 653
 654     /* Read new lines on a multiline response */
 655     $lines = $line;
 656     while(ereg("^[0-9]+-", $line)) {
 657         $line = fgets($smtpConnection, 1024);
 658         $lines .= $line;
 659     }
 660
 661     /* Status:  0 = fatal
 662      *          5 = ok
 663      */
 664     $err_num = substr($line, 0, strpos($line, " "));
 665     switch ($err_num) {
 666     case 500:   $message = 'Syntax error; command not recognized';
 667         $status = 0;
 668         break;
 669     case 501:   $message = 'Syntax error in parameters or arguments';
 670         $status = 0;
 671         break;
 672     case 502:   $message = 'Command not implemented';
 673         $status = 0;
 674         break;
 675     case 503:   $message = 'Bad sequence of commands';
 676         $status = 0;
 677         break;
 678     case 504:   $message = 'Command parameter not implemented';
 679         $status = 0;
 680         break;
 681
 682     case 211:   $message = 'System status, or system help reply';
 683         $status = 5;
 684         break;
 685     case 214:   $message = 'Help message';
 686         $status = 5;
 687         break;
 688
 689     case 220:   $message = 'Service ready';
 690         $status = 5;
 691         break;
 692     case 221:   $message = 'Service closing transmission channel';
 693         $status = 5;
 694         break;
 695
 696     case 421:   $message = 'Service not available, closing chanel';
 697         $status = 0;
 698         break;
 699
 700     case 235:   return(5);
 701         break;
 702     case 250:   $message = 'Requested mail action okay, completed';
 703         $status = 5;
 704         break;
 705     case 251:   $message = 'User not local; will forward';
 706         $status = 5;
 707         break;
 708     case 334:   return(5); break;
 709     case 450:   $message = 'Requested mail action not taken:  mailbox unavailable';
 710         $status = 0;
 711         break;
 712     case 550:   $message = 'Requested action not taken:  mailbox unavailable';
 713         $status = 0;
 714         break;
 715     case 451:   $message = 'Requested action aborted:  error in processing';
 716         $status = 0;
 717         break;
 718     case 551:   $message = 'User not local; please try forwarding';
 719         $status = 0;
 720         break;
 721     case 452:   $message = 'Requested action not taken:  insufficient system storage';
 722         $status = 0;
 723         break;
 724     case 552:   $message = 'Requested mail action aborted:  exceeding storage allocation';
 725         $status = 0;
 726         break;
 727     case 553:   $message = 'Requested action not taken: mailbox name not allowed';
 728         $status = 0;
 729         break;
 730     case 354:   $message = 'Start mail input; end with .';
 731         $status = 5;
 732         break;
 733     case 554:   $message = 'Transaction failed';
 734         $status = 0;
 735         break;
 736     default:    $message = 'Unknown response: '. nl2br(htmlspecialchars($lines));
 737         $status = 0;
 738         $error_num = '001';
 739         break;
 740     }
 741
 742     if ($status == 0) {
 743         include_once('../functions/page_header.php');
 744         if ($compose_new_win == '1') {
 745             compose_Header($color, 'None');
 746         }
 747         else {
 748             displayPageHeader($color, 'None');
 749         }
 750         include_once('../functions/display_messages.php');
 751         $lines = nl2br(htmlspecialchars($lines));
 752         $msg  = $message . "<br>\nServer replied: $lines";
 753         plain_error_message($msg, $color);
 754     }
 755     if (! $verbose) return $status;
 756     return $err_num;
 757 }
 758
 759 /* create new reference header per rfc2822 */
 760
 761 function calculate_references($refs, $inreplyto, $old_reply_to) {
 762     /**
 763      * Get the delimiter.
 764      */
 765     $rn = sqm_nrn();
 766     $refer = "";
 767     for ($i=1;$i<count($refs[0]);$i++) {
 768         if (!empty($refs[0][$i])) {
 769             if (preg_match("/^References:(.+)$/", $refs[0][$i], $regs)) {
 770                 $refer = trim($regs[1]);
 771             }
 772             else {
 773                 $refer .= ' ' . trim($refs[0][$i]);
 774             }
 775         }
 776     }
 777     $refer = trim($refer);
 778     if (strlen($refer) > 2) {
 779         $refer .= ' ' . $inreplyto;
 780     }
 781     else {
 782         if (!empty($old_reply_to)) {
 783             $refer .= $old_reply_to . ' ' . $inreplyto;
 784         }
 785         else {
 786             $refer .= $inreplyto;
 787         }
 788     }
 789     trim($refer);
 790     $refer = str_replace(' ', "$rn        ", $refer);
 791     return $refer;
 792 }
 793
 794 function sendMessage($t, $c, $b, $subject, $body, $reply_id, $MDN,
 795                      $prio = 3, $session) {
 796     global $useSendmail, $msg_id, $is_reply, $mailbox, $onetimepad,
 797         $data_dir, $username, $domain, $key, $version, $sent_folder,
 798         $imapServerAddress, $imapPort, $default_use_priority, $more_headers,
 799         $request_mdn, $request_dr;
 800
 801     /**
 802      * Get the delimiter.
 803      */
 804     $rn = sqm_nrn();
 805     $more_headers = Array();
 806
 807     do_hook('smtp_send');
 808
 809     $imap_stream = sqimap_login($username, $key, $imapServerAddress,
 810                                 $imapPort, 1);
 811
 812     if (isset($reply_id) && $reply_id) {
 813         sqimap_mailbox_select ($imap_stream, $mailbox);
 814         sqimap_messages_flag ($imap_stream, $reply_id, $reply_id, 'Answered');
 815
 816         /* Insert In-Reply-To and References headers if the
 817          * message-id of the message we reply to is set (longer than "<>")
 818          * The References header should really be the old Referenced header
 819          * with the message ID appended, and now it is (jmunro)
 820          */
 821         $sid = sqimap_session_id();
 822         $query = "$sid FETCH $reply_id (BODY.PEEK[HEADER.FIELDS (Message-Id In-Reply-To)])\r\n";
 823         fputs ($imap_stream, $query);
 824         $read_list = sqimap_read_data_list($imap_stream, $sid, true, $response, $message);
 825         $message_id = '';
 826         $in_reply_to = '';
 827         foreach ($read_list as $read) {
 828             foreach ($read as $r) {
 829                 if (preg_match("/^message-id:(.*)/iA", $r, $regs)) {
 830                     $message_id = trim($regs[1]);
 831                 }
 832                 if (preg_match("/^in-reply-to:(.*)/iA", $r, $regs)) {
 833                     $in_reply_to = trim($regs[1]);
 834                 }
 835             }
 836         }
 837
 838         if(strlen($message_id) > 2) {
 839             $refs = get_reference_header ($imap_stream, $reply_id);
 840             $inreplyto = $message_id;
 841             $old_reply_to = $in_reply_to;
 842             $refer = calculate_references ($refs, $inreplyto, $old_reply_to);
 843             $more_headers['In-Reply-To'] = $inreplyto;
 844             $more_headers['References']  = $refer;
 845         }
 846
 847     }
 848     if ($default_use_priority) {
 849         $more_headers = array_merge($more_headers, createPriorityHeaders($prio));
 850     }
 851
 852     $requestRecipt = 0;
 853     if (isset($request_dr)) {
 854         $requestRecipt += 1;
 855     }
 856     if (isset($request_mdn)) {
 857         $requestRecipt += 2;
 858     }
 859     if ( $requestRecipt > 0) {
 860         $more_headers = array_merge($more_headers, createReceiptHeaders($requestRecipt));
 861     }
 862
 863     /* In order to remove the problem of users not able to create
 864      * messages with "." on a blank line, RFC821 has made provision
 865      * in section 4.5.2 (Transparency).
 866      */
 867     $body = ereg_replace("\n\\.", "\n..", $body);
 868     $body = ereg_replace("^\\.", "..", $body);
 869
 870     /* this is to catch all plain \n instances and
 871      * replace them with \r\n.  All newlines were converted
 872      * into just \n inside the compose.php file.
 873      * But only if delimiter is, in fact, \r\n.
 874      */
 875     if ($rn == "\r\n"){
 876         $body = ereg_replace("\n", "\r\n", $body);
 877     }
 878
 879     if ($MDN) {
 880         $more_headers["Content-Type"] = "multipart/report; ".
 881             "report-type=disposition-notification;";
 882     }
 883
 884     if ($useSendmail) {
 885         $length = sendSendmail($t, $c, $b, $subject, $body, $more_headers,
 886                                $session);
 887     } else {
 888         $length = sendSMTP($t, $c, $b, $subject, $body, $more_headers,
 889                            $session);
 890     }
 891     if (sqimap_mailbox_exists ($imap_stream, $sent_folder)) {
 892         sqimap_append ($imap_stream, $sent_folder, $length);
 893         write822Header ($imap_stream, $t, $c, $b, $subject, $more_headers,
 894                         $session);
 895         writeBody ($imap_stream, $body, $session);
 896         sqimap_append_done ($imap_stream);
 897     }
 898     sqimap_logout($imap_stream);
 899     /* Delete the files uploaded for attaching (if any).
 900      * only if $length != 0 (if there was no error)
 901      */
 902     if ($length) {
 903         ClearAttachments($session);
 904     }
 905
 906     return $length;
 907 }
 908
 909 function createPriorityHeaders($prio) {
 910     $prio_headers = Array();
 911     $prio_headers['X-Priority'] = $prio;
 912
 913     switch($prio) {
 914     case 1: $prio_headers['Importance'] = 'High';
 915         $prio_headers['X-MSMail-Priority'] = 'High';
 916         break;
 917
 918     case 3: $prio_headers['Importance'] = 'Normal';
 919         $prio_headers['X-MSMail-Priority'] = 'Normal';
 920         break;
 921
 922     case 5:
 923         $prio_headers['Importance'] = 'Low';
 924         $prio_headers['X-MSMail-Priority'] = 'Low';
 925         break;
 926     }
 927     return  $prio_headers;
 928 }
 929
 930 function createReceiptHeaders($receipt) {
 931
 932     GLOBAL $data_dir, $username, $identity, $popuser, $domain;
 933
 934     $receipt_headers = Array();
 935     if (isset($identity) && $identity != 'default') {
 936         $from = getPref($data_dir, $username, 'full_name' . $identity);
 937         $from_addr = getPref($data_dir, $username, 'email_address' . $identity);
 938     } else {
 939         $from = getPref($data_dir, $username, 'full_name');
 940         $from_addr = getPref($data_dir, $username, 'email_address');
 941     }
 942     if ($from_addr == '') {
 943         $from_addr = $popuser.'@'.$domain;
 944     }
 945
 946     if ($from == '') {
 947         $from = "<$from_addr>";
 948     }
 949     else {
 950         $from = '"' . encodeHeader($from) . "\" <$from_addr>";
 951     }
 952
 953     /* On Delivery */
 954     if ( $receipt == 1
 955         || $receipt == 3 ) {
 956         $receipt_headers["Return-Receipt-To"] = $from;
 957     }
 958     /* On Read */
 959     if ($receipt == 2
 960         || $receipt == 3 ) {
 961         /* Pegasus Mail */
 962         $receipt_headers["X-Confirm-Reading-To"] = $from;
 963         /* RFC 2298 */
 964         $receipt_headers["Disposition-Notification-To"] = $from;
 965     }
 966     return $receipt_headers;
 967 }
 968
 969
 970 ?>