X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=program%2Fsteps%2Fmail%2Fsendmail.inc;h=8ea9f55dde748383f55e31ffb9bb41f92de0dba8;hb=76507f7c63a660742e76889ad6e3919f3dde3bb0;hp=445ba206bf95705e811c87e1dbc9fce184911fd4;hpb=1213c6e65f2bab1e140369839a9d0f6db28a9492;p=roundcube.git

diff --git a/program/steps/mail/sendmail.inc b/program/steps/mail/sendmail.inc
index 445ba20..8ea9f55 100644
--- a/program/steps/mail/sendmail.inc
+++ b/program/steps/mail/sendmail.inc
@@ -4,8 +4,8 @@
  +-----------------------------------------------------------------------+
  | program/steps/mail/sendmail.inc                                       |
  |                                                                       |
- | This file is part of the RoundCube Webmail client                     |
- | Copyright (C) 2005-2009, RoundCube Dev. - Switzerland                 |
+ | This file is part of the Roundcube Webmail client                     |
+ | Copyright (C) 2005-2011, The Roundcube Dev Team                       |
  | Licensed under the GNU GPL                                            |
  |                                                                       |
  | PURPOSE:                                                              |
@@ -16,23 +16,27 @@
  | Author: Thomas Bruederli <roundcube@gmail.com>                        |
  +-----------------------------------------------------------------------+
 
- $Id: sendmail.inc 2320 2009-03-01 07:55:39Z alec $
+ $Id: sendmail.inc 5527 2011-12-02 09:58:03Z alec $
 
 */
 
-
 // remove all scripts and act as called in frame
 $OUTPUT->reset();
 $OUTPUT->framed = TRUE;
 
-$savedraft = !empty($_POST['_draft']) ? TRUE : FALSE;
+$savedraft = !empty($_POST['_draft']) ? true : false;
+
+$COMPOSE_ID = get_input_value('_id', RCUBE_INPUT_GPC);
+$COMPOSE    =& $_SESSION['compose_data_'.$COMPOSE_ID];
 
 /****** checks ********/
 
-if (!isset($_SESSION['compose']['id'])) {
-  raise_error(array('code' => 500, 'type' => 'smtp', 'file' => __FILE__, 'message' => "Invalid compose ID"), true, false);
-  console("Sendmail error", $_SESSION['compose']);
-  $OUTPUT->show_message("An internal error occured. Please try again.", 'error');
+if (!isset($COMPOSE['id'])) {
+  raise_error(array('code' => 500, 'type' => 'php',
+    'file' => __FILE__, 'line' => __LINE__,
+    'message' => "Invalid compose ID"), true, false);
+
+  $OUTPUT->show_message('internalerror', 'error');
   $OUTPUT->send('iframe');
 }
 
@@ -55,54 +59,51 @@ if (!$savedraft) {
 
 /****** message sending functions ********/
 
+// encrypt parts of the header
+function rcmail_encrypt_header($what)
+{
+  global $CONFIG, $RCMAIL;
+  if (!$CONFIG['http_received_header_encrypt']) {
+    return $what;
+  }
+  return $RCMAIL->encrypt($what);
+}
+
 // get identity record
 function rcmail_get_identity($id)
-  {
+{
   global $USER, $OUTPUT;
-  
-  if ($sql_arr = $USER->get_identity($id))
-    {
+
+  if ($sql_arr = $USER->get_identity($id)) {
     $out = $sql_arr;
     $out['mailto'] = $sql_arr['email'];
-    
-    // Special chars as defined by RFC 822 need to in quoted string (or escaped).
-    if (preg_match('/[\(\)\<\>\\\.\[\]@,;:"]/', $sql_arr['name']))
-      $name = '"' . addcslashes($sql_arr['name'], '"') . '"';
-    else
-      $name = $sql_arr['name'];
-
-    $out['string'] = rcube_charset_convert($name, RCMAIL_CHARSET, $OUTPUT->get_charset());
-    if ($sql_arr['email'])
-      $out['string'] .= ' <' . $sql_arr['email'] . '>';
+    $out['string'] = format_email_recipient($sql_arr['email'],
+      rcube_charset_convert($sql_arr['name'], RCMAIL_CHARSET, $OUTPUT->get_charset()));
 
     return $out;
-    }
-
-  return FALSE;  
   }
 
+  return FALSE;
+}
+
 /**
  * go from this:
- * <img src=".../tiny_mce/plugins/emotions/images/smiley-cool.gif" border="0" alt="Cool" title="Cool" />
+ * <img src="http[s]://.../tiny_mce/plugins/emotions/images/smiley-cool.gif" border="0" alt="Cool" title="Cool" />
  *
  * to this:
  *
- * <IMG src="cid:smiley-cool.gif"/>
+ * <img src="/path/on/server/.../tiny_mce/plugins/emotions/images/smiley-cool.gif" border="0" alt="Cool" title="Cool" />
  * ...
- * ------part...
- * Content-Type: image/gif
- * Content-Transfer-Encoding: base64
- * Content-ID: <smiley-cool.gif>
  */
-function rcmail_attach_emoticons(&$mime_message)
+function rcmail_fix_emoticon_paths(&$mime_message)
 {
   global $CONFIG;
 
-  $body = $mime_message->getHtmlBody();
+  $body = $mime_message->getHTMLBody();
 
   // remove any null-byte characters before parsing
   $body = preg_replace('/\x00/', '', $body);
-  
+
   $searchstr = 'program/js/tiny_mce/plugins/emotions/img/';
   $offset = 0;
 
@@ -121,7 +122,7 @@ function rcmail_attach_emoticons(&$mime_message)
 
         if (! in_array($image_name, $included_images)) {
           // add the image to the MIME message
-          if(! $mime_message->addHTMLImage($img_file, 'image/gif', '', true, $image_name))
+          if (! $mime_message->addHTMLImage($img_file, 'image/gif', '', true, $image_name))
             $OUTPUT->show_message("emoticonerror", 'error');
           array_push($included_images, $image_name);
         }
@@ -137,61 +138,90 @@ function rcmail_attach_emoticons(&$mime_message)
   return $body;
 }
 
-// parse email address input
-function rcmail_mailto_format($mailto)
+/**
+ * Parse and cleanup email address input (and count addresses)
+ *
+ * @param string  Address input
+ * @param boolean Do count recipients (saved in global $RECIPIENT_COUNT)
+ * @param boolean Validate addresses (errors saved in global $EMAIL_FORMAT_ERROR)
+ * @return string Canonical recipients string separated by comma
+ */
+function rcmail_email_input_format($mailto, $count=false, $check=true)
 {
-  $regexp = array('/[,;]\s*[\r\n]+/', '/[\r\n]+/', '/[,;]\s*$/m', '/;/', '/(\S{1})(<\S+@\S+>)/U');
-  $replace = array(', ', ', ', '', ',', '\\1 \\2');
+  global $RCMAIL, $EMAIL_FORMAT_ERROR, $RECIPIENT_COUNT;
+
+  // simplified email regexp, supporting quoted local part
+  $email_regexp = '(\S+|("[^"]+"))@\S+';
+
+  $delim = trim($RCMAIL->config->get('recipients_separator', ','));
+  $regexp  = array("/[,;$delim]\s*[\r\n]+/", '/[\r\n]+/', "/[,;$delim]\s*\$/m", '/;/', '/(\S{1})(<'.$email_regexp.'>)/U');
+  $replace = array($delim.' ', ', ', '', $delim, '\\1 \\2');
 
   // replace new lines and strip ending ', ', make address input more valid
   $mailto = trim(preg_replace($regexp, $replace, $mailto));
 
   $result = array();
-  $items = rcube_explode_quoted_string(',', $mailto);
+  $items = rcube_explode_quoted_string($delim, $mailto);
 
   foreach($items as $item) {
     $item = trim($item);
     // address in brackets without name (do nothing)
-    if (preg_match('/^<\S+@\S+>$/', $item)) {
-      $result[] = $item;
+    if (preg_match('/^<'.$email_regexp.'>$/', $item)) {
+      $item = rcube_idn_to_ascii(trim($item, '<>'));
+      $result[] = '<' . $item . '>';
     // address without brackets and without name (add brackets)
-    } else if (preg_match('/^\S+@\S+$/', $item)) {
-      $result[] = '<'.$item.'>';
+    } else if (preg_match('/^'.$email_regexp.'$/', $item)) {
+      $item = rcube_idn_to_ascii($item);
+      $result[] = '<' . $item . '>';
     // address with name (handle name)
-    } else if (preg_match('/\S+@\S+>*$/', $item, $matches)) {
+    } else if (preg_match('/<*'.$email_regexp.'>*$/', $item, $matches)) {
       $address = $matches[0];
-      $name = str_replace($address, '', $item);
-      $name = trim($name);
-      if ($name && ($name[0] != '"' || $name[strlen($name)-1] != '"')
-          && preg_match('/[\(\)\<\>\\\.\[\]@,;:"]/', $name)) {
-	  $name = '"'.addcslashes($name, '"').'"';
-      }
-      if (!preg_match('/^<\S+@\S+>$/', $address))
-        $address = '<'.$address.'>';
-
-      $result[] = $name.' '.$address;
+      $name = trim(str_replace($address, '', $item), '" ');
+      $address = rcube_idn_to_ascii(trim($address, '<>'));
+      $result[] = format_email_recipient($address, $name);
+      $item = $address;
     } else if (trim($item)) {
-      // @TODO: handle errors
+      continue;
+    }
+
+    // check address format
+    $item = trim($item, '<>');
+    if ($item && $check && !check_email($item)) {
+      $EMAIL_FORMAT_ERROR = $item;
+      return;
     }
   }
 
+  if ($count) {
+    $RECIPIENT_COUNT += count($result);
+  }
+
   return implode(', ', $result);
 }
 
+
 /****** compose message ********/
 
 if (strlen($_POST['_draft_saveid']) > 3)
   $olddraftmessageid = get_input_value('_draft_saveid', RCUBE_INPUT_POST);
 
-$message_id = sprintf('<%s@%s>', md5(uniqid('rcmail'.rand(),true)), $RCMAIL->config->mail_domain($_SESSION['imap_host']));
+$message_id = rcmail_gen_message_id();
 
 // set default charset
 $input_charset = $OUTPUT->get_charset();
 $message_charset = isset($_POST['_charset']) ? $_POST['_charset'] : $input_charset;
 
-$mailto = rcmail_mailto_format(get_input_value('_to', RCUBE_INPUT_POST, TRUE, $message_charset));
-$mailcc = rcmail_mailto_format(get_input_value('_cc', RCUBE_INPUT_POST, TRUE, $message_charset));
-$mailbcc = rcmail_mailto_format(get_input_value('_bcc', RCUBE_INPUT_POST, TRUE, $message_charset));
+$EMAIL_FORMAT_ERROR = NULL;
+$RECIPIENT_COUNT = 0;
+
+$mailto = rcmail_email_input_format(get_input_value('_to', RCUBE_INPUT_POST, TRUE, $message_charset), true);
+$mailcc = rcmail_email_input_format(get_input_value('_cc', RCUBE_INPUT_POST, TRUE, $message_charset), true);
+$mailbcc = rcmail_email_input_format(get_input_value('_bcc', RCUBE_INPUT_POST, TRUE, $message_charset), true);
+
+if ($EMAIL_FORMAT_ERROR) {
+  $OUTPUT->show_message('emailformaterror', 'error', array('email' => $EMAIL_FORMAT_ERROR));
+  $OUTPUT->send('iframe');
+}
 
 if (empty($mailto) && !empty($mailcc)) {
   $mailto = $mailcc;
@@ -200,294 +230,506 @@ if (empty($mailto) && !empty($mailcc)) {
 else if (empty($mailto))
   $mailto = 'undisclosed-recipients:;';
 
-// get sender name and address
-$from = get_input_value('_from', RCUBE_INPUT_POST);
-$identity_arr = rcmail_get_identity($from);
-
-if ($identity_arr)
-  $from = $identity_arr['mailto'];
+// Get sender name and address...
+$from = get_input_value('_from', RCUBE_INPUT_POST, true, $message_charset);
+// ... from identity...
+if (is_numeric($from)) {
+  if (is_array($identity_arr = rcmail_get_identity($from))) {
+    if ($identity_arr['mailto'])
+      $from = $identity_arr['mailto'];
+    if ($identity_arr['string'])
+      $from_string = $identity_arr['string'];
+  }
+  else {
+    $from = null;
+  }
+}
+// ... if there is no identity record, this might be a custom from
+else if ($from_string = rcmail_email_input_format($from)) {
+  if (preg_match('/(\S+@\S+)/', $from_string, $m))
+    $from = trim($m[1], '<>');
+  else
+    $from = null;
+}
 
-if (empty($identity_arr['string']))
-  $identity_arr['string'] = $from;
+if (!$from_string && $from)
+  $from_string = $from;
 
 // compose headers array
-$headers = array('Date' => date('r'),
-                 'From' => rcube_charset_convert($identity_arr['string'], RCMAIL_CHARSET, $message_charset),
-                 'To'   => $mailto);
+$headers = array();
+
+// if configured, the Received headers goes to top, for good measure
+if ($CONFIG['http_received_header'])
+{
+  $nldlm = "\r\n\t";
+  // FROM/VIA
+  $http_header = 'from ';
+  if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+    $host = $_SERVER['HTTP_X_FORWARDED_FOR'];
+    $hostname = gethostbyaddr($host);
+    if ($CONFIG['http_received_header_encrypt']) {
+      $http_header .= rcmail_encrypt_header($hostname);
+      if ($host != $hostname)
+        $http_header .= ' ('. rcmail_encrypt_header($host) . ')';
+    } else {
+      $http_header .= (($host != $hostname) ? $hostname : '[' . $host . ']');
+      if ($host != $hostname)
+        $http_header .= ' (['. $host .'])';
+    }
+    $http_header .= $nldlm . ' via ';
+  }
+  $host = $_SERVER['REMOTE_ADDR'];
+  $hostname = gethostbyaddr($host);
+  if ($CONFIG['http_received_header_encrypt']) {
+    $http_header .= rcmail_encrypt_header($hostname);
+    if ($host != $hostname)
+      $http_header .= ' ('. rcmail_encrypt_header($host) . ')';
+  } else {
+    $http_header .= (($host != $hostname) ? $hostname : '[' . $host . ']');
+    if ($host != $hostname)
+      $http_header .= ' (['. $host .'])';
+  }
+  // BY
+  $http_header .= $nldlm . 'by ' . $_SERVER['HTTP_HOST'];
+  // WITH
+  $http_header .= $nldlm . 'with HTTP (' . $_SERVER['SERVER_PROTOCOL'] .
+      ' '.$_SERVER['REQUEST_METHOD'] . '); ' . date('r');
+  $http_header = wordwrap($http_header, 69, $nldlm);
+
+  $headers['Received'] = $http_header;
+}
+
+$headers['Date'] = rcmail_user_date();
+$headers['From'] = rcube_charset_convert($from_string, RCMAIL_CHARSET, $message_charset);
+$headers['To'] = $mailto;
 
 // additional recipients
-if (!empty($mailcc))
+if (!empty($mailcc)) {
   $headers['Cc'] = $mailcc;
-
-if (!empty($mailbcc))
+}
+if (!empty($mailbcc)) {
   $headers['Bcc'] = $mailbcc;
-  
-if (!empty($identity_arr['bcc']))
+}
+if (!empty($identity_arr['bcc'])) {
   $headers['Bcc'] = ($headers['Bcc'] ? $headers['Bcc'].', ' : '') . $identity_arr['bcc'];
+  $RECIPIENT_COUNT ++;
+}
+
+if (($max_recipients = (int) $RCMAIL->config->get('max_recipients')) > 0) {
+  if ($RECIPIENT_COUNT > $max_recipients) {
+    $OUTPUT->show_message('toomanyrecipients', 'error', array('max' => $max_recipients));
+    $OUTPUT->send('iframe');
+  }
+}
 
 // add subject
-$headers['Subject'] = trim(get_input_value('_subject', RCUBE_INPUT_POST, FALSE, $message_charset));
+$headers['Subject'] = trim(get_input_value('_subject', RCUBE_INPUT_POST, TRUE, $message_charset));
 
-if (!empty($identity_arr['organization']))
+if (!empty($identity_arr['organization'])) {
   $headers['Organization'] = $identity_arr['organization'];
+}
+if (!empty($_POST['_replyto'])) {
+  $headers['Reply-To'] = rcmail_email_input_format(get_input_value('_replyto', RCUBE_INPUT_POST, TRUE, $message_charset));
+}
+else if (!empty($identity_arr['reply-to'])) {
+  $headers['Reply-To'] = rcmail_email_input_format($identity_arr['reply-to'], false, true);
+}
+if (!empty($headers['Reply-To'])) {
+  $headers['Mail-Reply-To'] = $headers['Reply-To'];
+}
+if (!empty($_POST['_followupto'])) {
+  $headers['Mail-Followup-To'] = rcmail_email_input_format(get_input_value('_followupto', RCUBE_INPUT_POST, TRUE, $message_charset));
+}
+if (!empty($COMPOSE['reply_msgid'])) {
+  $headers['In-Reply-To'] = $COMPOSE['reply_msgid'];
+}
 
-if (!empty($_POST['_replyto']))
-  $headers['Reply-To'] = rcmail_mailto_format(get_input_value('_replyto', RCUBE_INPUT_POST, TRUE, $message_charset));
-else if (!empty($identity_arr['reply-to']))
-  $headers['Reply-To'] = $identity_arr['reply-to'];
-
-if (!empty($_SESSION['compose']['reply_msgid']))
-  $headers['In-Reply-To'] = $_SESSION['compose']['reply_msgid'];
+// remember reply/forward UIDs in special headers
+if (!empty($COMPOSE['reply_uid']) && $savedraft) {
+  $headers['X-Draft-Info'] = array('type' => 'reply', 'uid' => $COMPOSE['reply_uid']);
+}
+else if (!empty($COMPOSE['forward_uid']) && $savedraft) {
+  $headers['X-Draft-Info'] = array('type' => 'forward', 'uid' => $COMPOSE['forward_uid']);
+}
 
-if (!empty($_SESSION['compose']['references']))
-  $headers['References'] = $_SESSION['compose']['references'];
+if (!empty($COMPOSE['references'])) {
+  $headers['References'] = $COMPOSE['references'];
+}
 
-if (!empty($_POST['_priority']))
-  {
+if (!empty($_POST['_priority'])) {
   $priority = intval($_POST['_priority']);
   $a_priorities = array(1=>'highest', 2=>'high', 4=>'low', 5=>'lowest');
-  if ($str_priority = $a_priorities[$priority])
+  if ($str_priority = $a_priorities[$priority]) {
     $headers['X-Priority'] = sprintf("%d (%s)", $priority, ucfirst($str_priority));
   }
+}
 
-if (!empty($_POST['_receipt']))
-  {
-  $headers['Return-Receipt-To'] = $identity_arr['string'];
-  $headers['Disposition-Notification-To'] = $identity_arr['string'];
-  }
-
-// additional headers
-if ($CONFIG['http_received_header'])
-{
-  $nldlm = $RCMAIL->config->header_delimiter() . "\t";
-  $headers['Received'] =  wordwrap('from ' . (isset($_SERVER['HTTP_X_FORWARDED_FOR']) ?
-      gethostbyaddr($_SERVER['HTTP_X_FORWARDED_FOR']).' ['.$_SERVER['HTTP_X_FORWARDED_FOR'].']'.$nldlm.' via ' : '') .
-    gethostbyaddr($_SERVER['REMOTE_ADDR']).' ['.$_SERVER['REMOTE_ADDR'].']'.$nldlm.'with ' .
-    $_SERVER['SERVER_PROTOCOL'].' ('.$_SERVER['REQUEST_METHOD'].'); ' . date('r'),
-    69, $nldlm);
+if (!empty($_POST['_receipt'])) {
+  $headers['Return-Receipt-To'] = $from_string;
+  $headers['Disposition-Notification-To'] = $from_string;
 }
 
+// additional headers
 $headers['Message-ID'] = $message_id;
 $headers['X-Sender'] = $from;
 
-if (!empty($CONFIG['useragent']))
+if (is_array($headers['X-Draft-Info'])) {
+  $headers['X-Draft-Info'] = rcmail_draftinfo_encode($headers['X-Draft-Info'] + array('folder' => $COMPOSE['mailbox']));
+}
+if (!empty($CONFIG['useragent'])) {
   $headers['User-Agent'] = $CONFIG['useragent'];
+}
 
-$isHtmlVal = strtolower(get_input_value('_is_html', RCUBE_INPUT_POST));
-$isHtml = ($isHtmlVal == "1");
+// exec hook for header checking and manipulation
+$data = $RCMAIL->plugins->exec_hook('message_outgoing_headers', array('headers' => $headers));
+
+// sending aborted by plugin
+if ($data['abort'] && !$savedraft) {
+  $OUTPUT->show_message($data['message'] ? $data['message'] : 'sendingfailed');
+  $OUTPUT->send('iframe');
+}
+else
+  $headers = $data['headers'];
+
+
+$isHtml = (bool) get_input_value('_is_html', RCUBE_INPUT_POST);
 
 // fetch message body
 $message_body = get_input_value('_message', RCUBE_INPUT_POST, TRUE, $message_charset);
 
 if (!$savedraft) {
-  // remove signature's div ID
-  if ($isHtml)
+  if ($isHtml) {
+    // remove signature's div ID
     $message_body = preg_replace('/\s*id="_rc_sig"/', '', $message_body);
 
+    // add inline css for blockquotes
+    $bstyle = 'padding-left:5px; border-left:#1010ff 2px solid; margin-left:5px; width:100%';
+    $message_body = preg_replace('/<blockquote>/',
+      '<blockquote type="cite" style="'.$bstyle.'">', $message_body);
+
+    // append doctype and html/body wrappers
+    $message_body = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">' .
+      "\r\n<html><body>\r\n" . $message_body;
+  }
+
+  // Check spelling before send
+  if ($CONFIG['spellcheck_before_send'] && $CONFIG['enable_spellcheck']
+    && empty($COMPOSE['spell_checked']) && !empty($message_body)
+  ) {
+    $spellchecker = new rcube_spellchecker(get_input_value('_lang', RCUBE_INPUT_GPC));
+    $spell_result = $spellchecker->check($message_body, $isHtml);
+
+    $COMPOSE['spell_checked'] = true;
+
+    if (!$spell_result) {
+      $result = $isHtml ? $spellchecker->get_words() : $spellchecker->get_xml();
+      $OUTPUT->show_message('mispellingsfound', 'error');
+      $OUTPUT->command('spellcheck_resume', $isHtml, $result);
+      $OUTPUT->send('iframe');
+    }
+  }
+
   // generic footer for all messages
-  if (!empty($CONFIG['generic_message_footer'])) {
+  if ($isHtml && !empty($CONFIG['generic_message_footer_html'])) {
+      $footer = file_get_contents(realpath($CONFIG['generic_message_footer_html']));
+      $footer = rcube_charset_convert($footer, RCMAIL_CHARSET, $message_charset);
+  }
+  else if (!empty($CONFIG['generic_message_footer'])) {
     $footer = file_get_contents(realpath($CONFIG['generic_message_footer']));
-    $footer = rcube_charset_convert($footer, 'UTF-8', $message_charset);
+    $footer = rcube_charset_convert($footer, RCMAIL_CHARSET, $message_charset);
+    if ($isHtml)
+      $footer = '<pre>'.$footer.'</pre>';
   }
+
+  if ($footer)
+    $message_body .= "\r\n" . $footer;
+  if ($isHtml)
+    $message_body .= "\r\n</body></html>\r\n";
 }
 
-// create extended PEAR::Mail_mime instance
-$MAIL_MIME = new rcube_mail_mime($RCMAIL->config->header_delimiter());
+// set line length for body wrapping
+$LINE_LENGTH = $RCMAIL->config->get('line_length', 72);
+
+// Since we can handle big messages with disk usage, we need more time to work
+@set_time_limit(0);
+
+// create PEAR::Mail_mime instance
+$MAIL_MIME = new Mail_mime("\r\n");
+
+// Check if we have enough memory to handle the message in it
+// It's faster than using files, so we'll do this if we only can
+if (is_array($COMPOSE['attachments']) && $CONFIG['smtp_server']
+  && ($mem_limit = parse_bytes(ini_get('memory_limit'))))
+{
+  $memory = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB
+
+  foreach ($COMPOSE['attachments'] as $id => $attachment)
+    $memory += $attachment['size'];
+
+  // Yeah, Net_SMTP needs up to 12x more memory, 1.33 is for base64
+  if ($memory * 1.33 * 12 > $mem_limit)
+    $MAIL_MIME->setParam('delay_file_io', true);
+}
 
 // For HTML-formatted messages, construct the MIME message with both
 // the HTML part and the plain-text part
 
-if ($isHtml)
-  {
-  $MAIL_MIME->setHTMLBody($message_body . ($footer ? "\r\n<pre>".$footer.'</pre>' : ''));
+if ($isHtml) {
+  $plugin = $RCMAIL->plugins->exec_hook('message_outgoing_body',
+    array('body' => $message_body, 'type' => 'html', 'message' => $MAIL_MIME));
+
+  $MAIL_MIME->setHTMLBody($plugin['body']);
+
+  // replace emoticons
+  $plugin['body'] = rcmail_replace_emoticons($plugin['body']);
 
   // add a plain text version of the e-mail as an alternative part.
-  $h2t = new html2text($message_body);
-  $plainTextPart = $h2t->get_text() . ($footer ? "\r\n".$footer : '');
+  $h2t = new html2text($plugin['body'], false, true, 0);
+  $plainTextPart = rc_wordwrap($h2t->get_text(), $LINE_LENGTH, "\r\n");
   $plainTextPart = wordwrap($plainTextPart, 998, "\r\n", true);
-  if (!strlen($plainTextPart)) 
-    { 
-    // empty message body breaks attachment handling in drafts 
-    $plainTextPart = "\r\n"; 
-    }
-  $MAIL_MIME->setTXTBody($plainTextPart);
-
-  // look for "emoticon" images from TinyMCE and copy into message as attachments
-  $message_body = rcmail_attach_emoticons($MAIL_MIME);
+  if (!$plainTextPart) {
+    // empty message body breaks attachment handling in drafts
+    $plainTextPart = "\r\n";
   }
-else
-  {
-  $message_body = wordwrap($message_body, 75, "\r\n");
-  if ($footer)
-    $message_body .= "\r\n" . $footer;
+  else {
+    // make sure all line endings are CRLF (#1486712)
+    $plainTextPart = preg_replace('/\r?\n/', "\r\n", $plainTextPart);
+  }
+
+  $plugin = $RCMAIL->plugins->exec_hook('message_outgoing_body',
+    array('body' => $plainTextPart, 'type' => 'alternative', 'message' => $MAIL_MIME));
+
+  $MAIL_MIME->setTXTBody($plugin['body']);
+
+  // look for "emoticon" images from TinyMCE and change their src paths to
+  // be file paths on the server instead of URL paths.
+  $message_body = rcmail_fix_emoticon_paths($MAIL_MIME);
+}
+else {
+  $plugin = $RCMAIL->plugins->exec_hook('message_outgoing_body',
+    array('body' => $message_body, 'type' => 'plain', 'message' => $MAIL_MIME));
+
+  $message_body = $plugin['body'];
+
+  // compose format=flowed content if enabled
+  if ($flowed = $RCMAIL->config->get('send_format_flowed', true))
+    $message_body = rcube_message::format_flowed($message_body, min($LINE_LENGTH+2, 79));
+  else
+    $message_body = rc_wordwrap($message_body, $LINE_LENGTH, "\r\n");
+
   $message_body = wordwrap($message_body, 998, "\r\n", true);
-  if (!strlen($message_body))  
-    { 
+  if (!strlen($message_body)) { 
     // empty message body breaks attachment handling in drafts 
     $message_body = "\r\n"; 
-    } 
-  $MAIL_MIME->setTXTBody($message_body, FALSE, TRUE);
   }
 
-// chose transfer encoding
-$charset_7bit = array('ASCII', 'ISO-2022-JP', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-15');
-$transfer_encoding = in_array(strtoupper($message_charset), $charset_7bit) ? '7bit' : '8bit';
+  $MAIL_MIME->setTXTBody($message_body, false, true);
+}
 
 // add stored attachments, if any
-if (is_array($_SESSION['compose']['attachments']))
-  foreach ($_SESSION['compose']['attachments'] as $id => $attachment)
-  {
-    $dispurl = '/\ssrc\s*=\s*[\'"]*\S+display-attachment\S+file=rcmfile' . $id . '[\s\'"]\s*/';
-    $match = preg_match($dispurl, $message_body, $matches);
-    if ($isHtml && ($match > 0))
-    {
+if (is_array($COMPOSE['attachments']))
+{
+  foreach ($COMPOSE['attachments'] as $id => $attachment) {
+    // This hook retrieves the attachment contents from the file storage backend
+    $attachment = $RCMAIL->plugins->exec_hook('attachment_get', $attachment);
+
+    $dispurl = '/\ssrc\s*=\s*[\'"]*\S+display-attachment\S+file=rcmfile' . preg_quote($attachment['id']) . '[\s\'"]*/';
+    $message_body = $MAIL_MIME->getHTMLBody();
+    if ($isHtml && (preg_match($dispurl, $message_body) > 0)) {
       $message_body = preg_replace($dispurl, ' src="'.$attachment['name'].'" ', $message_body);
-      $MAIL_MIME->setHTMLBody($message_body. ($footer ? "\r\n<pre>".$footer.'</pre>' : ''));
-      $MAIL_MIME->addHTMLImage($attachment['path'], $attachment['mimetype'], $attachment['name']);
+      $MAIL_MIME->setHTMLBody($message_body);
+
+      if ($attachment['data'])
+        $MAIL_MIME->addHTMLImage($attachment['data'], $attachment['mimetype'], $attachment['name'], false);
+      else
+        $MAIL_MIME->addHTMLImage($attachment['path'], $attachment['mimetype'], $attachment['name'], true);
     }
-    else
-    {
+    else {
       $ctype = str_replace('image/pjpeg', 'image/jpeg', $attachment['mimetype']); // #1484914
+      $file = $attachment['data'] ? $attachment['data'] : $attachment['path'];
 
       // .eml attachments send inline
-      $MAIL_MIME->addAttachment($attachment['path'],
-        $ctype, 
-        $attachment['name'], true, 
-        ($ctype == 'message/rfc822' ? $transfer_encoding : 'base64'),
+      $MAIL_MIME->addAttachment($file,
+        $ctype,
+        $attachment['name'],
+        ($attachment['data'] ? false : true),
+        ($ctype == 'message/rfc822' ? '8bit' : 'base64'),
         ($ctype == 'message/rfc822' ? 'inline' : 'attachment'),
-        $message_charset, '', '', 
-	$CONFIG['mime_param_folding'] ? 'quoted-printable' : NULL,
-	$CONFIG['mime_param_folding'] == 2 ? 'quoted-printable' : NULL
-	);
+        '', '', '',
+        $CONFIG['mime_param_folding'] ? 'quoted-printable' : NULL,
+        $CONFIG['mime_param_folding'] == 2 ? 'quoted-printable' : NULL,
+        '', RCMAIL_CHARSET
+      );
     }
   }
+}
 
-// add submitted attachments
-if (is_array($_FILES['_attachments']['tmp_name']))
-  foreach ($_FILES['_attachments']['tmp_name'] as $i => $filepath)
-    {
-    $ctype = $files['type'][$i];
-    $ctype = str_replace('image/pjpeg', 'image/jpeg', $ctype); // #1484914
-    
-    $MAIL_MIME->addAttachment($filepath, $ctype, $files['name'][$i], true,
-	$ctype == 'message/rfc822' ? $transfer_encoding : 'base64',
-	'attachment', $message_charset, '', '', 
-	$CONFIG['mime_param_folding'] ? 'quoted-printable' : NULL,
-	$CONFIG['mime_param_folding'] == 2 ? 'quoted-printable' : NULL
-	);
-    }
-
+// choose transfer encoding for plain/text body
+if (preg_match('/[^\x00-\x7F]/', $MAIL_MIME->getTXTBody()))
+  $transfer_encoding = $RCMAIL->config->get('force_7bit') ? 'quoted-printable' : '8bit';
+else
+  $transfer_encoding = '7bit';
 
 // encoding settings for mail composing
-$MAIL_MIME->setParam(array(
-  'text_encoding' => $transfer_encoding,
-  'html_encoding' => 'quoted-printable',
-  'head_encoding' => 'quoted-printable',
-  'head_charset'  => $message_charset,
-  'html_charset'  => $message_charset,
-  'text_charset'  => $message_charset,
-));
+$MAIL_MIME->setParam('text_encoding', $transfer_encoding);
+$MAIL_MIME->setParam('html_encoding', 'quoted-printable');
+$MAIL_MIME->setParam('head_encoding', 'quoted-printable');
+$MAIL_MIME->setParam('head_charset', $message_charset);
+$MAIL_MIME->setParam('html_charset', $message_charset);
+$MAIL_MIME->setParam('text_charset', $message_charset . ($flowed ? ";\r\n format=flowed" : ''));
 
 // encoding subject header with mb_encode provides better results with asian characters
-if (function_exists("mb_encode_mimeheader"))
-{
+if (function_exists('mb_encode_mimeheader')) {
   mb_internal_encoding($message_charset);
-  $headers['Subject'] = mb_encode_mimeheader($headers['Subject'], $message_charset, 'Q');
+  $headers['Subject'] = mb_encode_mimeheader($headers['Subject'],
+    $message_charset, 'Q', "\r\n", 8);
   mb_internal_encoding(RCMAIL_CHARSET);
 }
 
 // pass headers to message object
 $MAIL_MIME->headers($headers);
 
-// Begin SMTP Delivery Block 
+// Begin SMTP Delivery Block
 if (!$savedraft)
 {
-  // check for 'From' address (identity may be incomplete)
-  if ($identity_arr && !$identity_arr['mailto']) {
+  // check 'From' address (identity may be incomplete)
+  if (empty($from)) {
     $OUTPUT->show_message('nofromaddress', 'error');
-    $OUTPUT->send('iframe'); 
+    $OUTPUT->send('iframe');
+  }
+
+  // Handle Delivery Status Notification request
+  if (!empty($_POST['_dsn'])) {
+    $smtp_opts['dsn'] = true;
   }
 
-  $sent = rcmail_deliver_message($MAIL_MIME, $from, $mailto);
-  
+  $sent = rcmail_deliver_message($MAIL_MIME, $from, $mailto,
+    $smtp_error, $mailbody_file, $smtp_opts);
+
   // return to compose page if sending failed
   if (!$sent)
     {
-    $OUTPUT->show_message("sendingfailed", 'error'); 
+    // remove temp file
+    if ($mailbody_file) {
+      unlink($mailbody_file);
+      }
+
+    if ($smtp_error)
+      $OUTPUT->show_message($smtp_error['label'], 'error', $smtp_error['vars']); 
+    else
+      $OUTPUT->show_message('sendingfailed', 'error'); 
     $OUTPUT->send('iframe');
     }
 
   // save message sent time
   if (!empty($CONFIG['sendmail_delay']))
     $RCMAIL->user->save_prefs(array('last_message_time' => time()));
-  
+
   // set replied/forwarded flag
-  if ($_SESSION['compose']['reply_uid'])
-    $IMAP->set_flag($_SESSION['compose']['reply_uid'], 'ANSWERED');
-  else if ($_SESSION['compose']['forward_uid'])
-    $IMAP->set_flag($_SESSION['compose']['forward_uid'], 'FORWARDED');
+  if ($COMPOSE['reply_uid'])
+    $IMAP->set_flag($COMPOSE['reply_uid'], 'ANSWERED', $COMPOSE['mailbox']);
+  else if ($COMPOSE['forward_uid'])
+    $IMAP->set_flag($COMPOSE['forward_uid'], 'FORWARDED', $COMPOSE['mailbox']);
 
 } // End of SMTP Delivery Block
 
 
-
 // Determine which folder to save message
 if ($savedraft)
   $store_target = $CONFIG['drafts_mbox'];
-else	
+else
   $store_target = isset($_POST['_store_target']) ? get_input_value('_store_target', RCUBE_INPUT_POST) : $CONFIG['sent_mbox'];
 
-if ($store_target)
-  {
-  // check if mailbox exists
-  if (!in_array_nocase($store_target, $IMAP->list_mailboxes()))
-    {
-      // folder may be existing but not subscribed (#1485241)
-      if (!in_array_nocase($store_target, $IMAP->list_unsubscribed()))
-        $store_folder = $IMAP->create_mailbox($store_target, TRUE);
-      else if ($IMAP->subscribe($store_target))
-        $store_folder = TRUE;
-    }
-  else
-    $store_folder = TRUE;
-  
-  // append message to sent box
-  if ($store_folder)
-    $saved = $IMAP->save_message($store_target, $MAIL_MIME->getMessage());
+if ($store_target) {
+  // check if folder is subscribed
+  if ($IMAP->mailbox_exists($store_target, true))
+    $store_folder = true;
+  // folder may be existing but not subscribed (#1485241)
+  else if (!$IMAP->mailbox_exists($store_target))
+    $store_folder = $IMAP->create_mailbox($store_target, true);
+  else if ($IMAP->subscribe($store_target))
+    $store_folder = true;
 
-  // raise error if saving failed
-  if (!$saved)
-    {
-    raise_error(array('code' => 800, 'type' => 'imap', 'file' => __FILE__,
-                      'message' => "Could not save message in $store_target"), TRUE, FALSE);
-    
-    if ($savedraft) {
-      $OUTPUT->show_message('errorsaving', 'error');
-      $OUTPUT->send('iframe');
+  // append message to sent box
+  if ($store_folder) {
+    // message body in file
+    if ($mailbody_file || $MAIL_MIME->getParam('delay_file_io')) {
+      $headers = $MAIL_MIME->txtHeaders();
+
+      // file already created
+      if ($mailbody_file)
+        $msg = $mailbody_file;
+      else {
+        $temp_dir = $RCMAIL->config->get('temp_dir');
+        $mailbody_file = tempnam($temp_dir, 'rcmMsg');
+        if (!PEAR::isError($msg = $MAIL_MIME->saveMessageBody($mailbody_file)))
+          $msg = $mailbody_file;
       }
     }
+    else {
+      $msg = $MAIL_MIME->getMessage();
+      $headers = '';
+    }
 
-  if ($olddraftmessageid)
-    {
-    // delete previous saved draft
-    $a_deleteid = $IMAP->search($CONFIG['drafts_mbox'], 'HEADER Message-ID '.$olddraftmessageid);
+    if (PEAR::isError($msg))
+      raise_error(array('code' => 650, 'type' => 'php',
+	    'file' => __FILE__, 'line' => __LINE__,
+            'message' => "Could not create message: ".$msg->getMessage()),
+            TRUE, FALSE);
+    else {
+      $saved = $IMAP->save_message($store_target, $msg, $headers, $mailbody_file ? true : false);
+    }
+
+    if ($mailbody_file) {
+      unlink($mailbody_file);
+      $mailbody_file = null;
+    }
 
-    $deleted = $IMAP->delete_message($IMAP->get_uid($a_deleteid[0], $CONFIG['drafts_mbox']), $CONFIG['drafts_mbox']);
+    // raise error if saving failed
+    if (!$saved) {
+      raise_error(array('code' => 800, 'type' => 'imap',
+	    'file' => __FILE__, 'line' => __LINE__,
+            'message' => "Could not save message in $store_target"), TRUE, FALSE);
 
-    // raise error if deletion of old draft failed
-    if (!$deleted)
-      raise_error(array('code' => 800, 'type' => 'imap', 'file' => __FILE__,
-                        'message' => "Could not delete message from ".$CONFIG['drafts_mbox']), TRUE, FALSE);
+      if ($savedraft) {
+        $OUTPUT->show_message('errorsaving', 'error');
+        $OUTPUT->send('iframe');
+      }
     }
   }
 
-if ($savedraft)
-  {
+  if ($olddraftmessageid) {
+    // delete previous saved draft
+    // @TODO: use message UID (remember to check UIDVALIDITY) to skip this SEARCH
+    $a_deleteid = $IMAP->search_once($CONFIG['drafts_mbox'],
+        'HEADER Message-ID '.$olddraftmessageid, true);
+
+    if (!empty($a_deleteid)) {
+      $deleted = $IMAP->delete_message($a_deleteid, $CONFIG['drafts_mbox']);
+
+      // raise error if deletion of old draft failed
+      if (!$deleted)
+        raise_error(array('code' => 800, 'type' => 'imap',
+          'file' => __FILE__, 'line' => __LINE__,
+          'message' => "Could not delete message from ".$CONFIG['drafts_mbox']), TRUE, FALSE);
+    }
+  }
+}
+// remove temp file
+else if ($mailbody_file) {
+  unlink($mailbody_file);
+}
+
+
+if ($savedraft) {
   $msgid = strtr($message_id, array('>' => '', '<' => ''));
-  
-  // remember new draft-uid
-  $draftids = $IMAP->search($CONFIG['drafts_mbox'], 'HEADER Message-ID '.$msgid);
-  $_SESSION['compose']['param']['_draft_uid'] = $IMAP->get_uid($draftids[0], $CONFIG['drafts_mbox']);
+
+  // remember new draft-uid ($saved could be an UID or TRUE here)
+  if (is_bool($saved)) {
+    $draftuids = $IMAP->search_once($CONFIG['drafts_mbox'], 'HEADER Message-ID '.$msgid, true);
+    $saved     = $draftuids[0];
+  }
+  $COMPOSE['param']['draft_uid'] = $saved;
 
   // display success
   $OUTPUT->show_message('messagesaved', 'confirmation');
@@ -500,16 +742,13 @@ if ($savedraft)
   $OUTPUT->command('auto_save_start');
 
   $OUTPUT->send('iframe');
-  }
-else
-  {
-  rcmail_compose_cleanup();
+}
+else {
+  rcmail_compose_cleanup($COMPOSE_ID);
 
   if ($store_folder && !$saved)
     $OUTPUT->command('sent_successfully', 'error', rcube_label('errorsavingsent'));
   else
     $OUTPUT->command('sent_successfully', 'confirmation', rcube_label('messagesent'));
   $OUTPUT->send('iframe');
-  }
-
-?>
+}