3
* PHPMailer RFC821 SMTP email transport class.
8
* @link https://github.com/PHPMailer/PHPMailer/
9
* @author Marcus Bointon (coolbru) <phpmailer@synchromedia.co.uk>
10
* @author Jim Jagielski (jimjag) <jimjag@gmail.com>
11
* @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
12
* @copyright 2013 Marcus Bointon
13
* @copyright 2004 - 2008 Andy Prevost
14
* @copyright 2010 - 2012 Jim Jagielski
15
* @license http://www.gnu.org/copyleft/lesser.html Distributed under the Lesser General Public License (LGPL)
19
* PHPMailer RFC821 SMTP email transport class.
21
* Implements RFC 821 SMTP commands
22
* and provides some utility methods for sending mail to an SMTP server.
28
* @link https://github.com/PHPMailer/PHPMailer/blob/master/class.smtp.php
29
* @author Chris Ryan <unknown@example.com>
30
* @author Marcus Bointon <phpmailer@synchromedia.co.uk>
31
* @license http://www.gnu.org/copyleft/lesser.html Distributed under the Lesser General Public License (LGPL)
37
* The PHPMailer SMTP Version number.
39
const VERSION = '5.2.7';
42
* SMTP line break constant.
47
* The SMTP port to use if one is not specified.
49
const DEFAULT_SMTP_PORT = 25;
52
* The PHPMailer SMTP Version number.
54
* @deprecated This should be a constant
57
public $Version = '5.2.7';
60
* SMTP server port number.
62
* @deprecated This is only ever ued as default value, so should be a constant
63
* @see SMTP::DEFAULT_SMTP_PORT
65
public $SMTP_PORT = 25;
68
* SMTP reply line ending
70
* @deprecated Use the class constant instead
73
public $CRLF = "\r\n";
77
* Options: 0 for no output, 1 for commands, 2 for data and commands
83
* The function/method to use for debugging output.
84
* Options: 'echo', 'html' or 'error_log'
87
public $Debugoutput = 'echo';
90
* Whether to use VERP.
93
public $do_verp = false;
96
* The SMTP timeout value for reads, in seconds.
102
* The SMTP timelimit value for reads, in seconds.
105
public $Timelimit = 30;
108
* The socket for the server connection.
111
protected $smtp_conn;
114
* Error message, if any, for the last call.
117
protected $error = '';
120
* The reply the server sent to us for HELO.
123
protected $helo_rply = '';
126
* The most recent reply received from the server.
129
protected $last_reply = '';
135
public function __construct()
137
$this->smtp_conn = 0;
139
$this->helo_rply = null;
145
* Output debugging info via a user-selected method.
146
* @param string $str Debug string to output
149
protected function edebug($str)
151
switch ($this->Debugoutput) {
153
//Don't output, just log
157
//Cleans up output a bit for a better looking, HTML-safe output
159
preg_replace('/[\r\n]+/', '', $str),
167
//Just echoes whatever was received
173
* Connect to an SMTP server.
174
* @param string $host SMTP server IP or host name
175
* @param int $port The port number to connect to
176
* @param int $timeout How long to wait for the connection to open
177
* @param array $options An array of options for stream_context_create()
181
public function connect($host, $port = null, $timeout = 30, $options = array())
183
// Clear errors to avoid confusion
186
// Make sure we are __not__ connected
187
if ($this->connected()) {
188
// Already connected, generate error
189
$this->error = array('error' => 'Already connected to a server');
194
$port = self::DEFAULT_SMTP_PORT;
197
// Connect to the SMTP server
200
$socket_context = stream_context_create($options);
201
//Suppress errors; connection failures are handled at a higher level
202
$this->smtp_conn = @stream_socket_client(
207
STREAM_CLIENT_CONNECT,
211
// Verify we connected properly
212
if (empty($this->smtp_conn)) {
213
$this->error = array(
214
'error' => 'Failed to connect to server',
218
if ($this->do_debug >= 1) {
220
'SMTP -> ERROR: ' . $this->error['error']
221
. ": $errstr ($errno)"
227
// SMTP server can take longer to respond, give longer timeout for first read
228
// Windows does not have support for this timeout function
229
if (substr(PHP_OS, 0, 3) != 'WIN') {
230
$max = ini_get('max_execution_time');
231
if ($max != 0 && $timeout > $max) { // Don't bother if unlimited
232
@set_time_limit($timeout);
234
stream_set_timeout($this->smtp_conn, $timeout, 0);
237
// Get any announcement
238
$announce = $this->get_lines();
240
if ($this->do_debug >= 2) {
241
$this->edebug('SMTP -> FROM SERVER:' . $announce);
248
* Initiate a TLS (encrypted) session.
252
public function startTLS()
254
if (!$this->sendCommand("STARTTLS", "STARTTLS", 220)) {
257
// Begin encrypted connection
258
if (!stream_socket_enable_crypto(
261
STREAM_CRYPTO_METHOD_TLS_CLIENT
270
* Perform SMTP authentication.
271
* Must be run after hello().
273
* @param string $username The user name
274
* @param string $password The password
275
* @param string $authtype The auth type (PLAIN, LOGIN, NTLM, CRAM-MD5)
276
* @param string $realm The auth realm for NTLM
277
* @param string $workstation The auth workstation for NTLM
279
* @return bool True if successfully authenticated.
281
public function authenticate(
288
if (empty($authtype)) {
294
// Start authentication
295
if (!$this->sendCommand('AUTH', 'AUTH PLAIN', 334)) {
298
// Send encoded username and password
299
if (!$this->sendCommand(
301
base64_encode("\0" . $username . "\0" . $password),
309
// Start authentication
310
if (!$this->sendCommand('AUTH', 'AUTH LOGIN', 334)) {
313
if (!$this->sendCommand("Username", base64_encode($username), 334)) {
316
if (!$this->sendCommand("Password", base64_encode($password), 235)) {
322
* ntlm_sasl_client.php
323
* Bundled with Permission
325
* How to telnet in windows:
326
* http://technet.microsoft.com/en-us/library/aa995718%28EXCHG.65%29.aspx
327
* PROTOCOL Docs http://curl.haxx.se/rfc/ntlm.html#ntlmSmtpAuthentication
329
require_once 'extras/ntlm_sasl_client.php';
330
$temp = new stdClass();
331
$ntlm_client = new ntlm_sasl_client_class;
332
//Check that functions are available
333
if (!$ntlm_client->Initialize($temp)) {
334
$this->error = array('error' => $temp->error);
335
if ($this->do_debug >= 1) {
337
'You need to enable some modules in your php.ini file: '
338
. $this->error['error']
344
$msg1 = $ntlm_client->TypeMsg1($realm, $workstation); //msg1
346
if (!$this->sendCommand(
348
'AUTH NTLM ' . base64_encode($msg1),
355
//Though 0 based, there is a white space after the 3 digit number
357
$challenge = substr($this->last_reply, 3);
358
$challenge = base64_decode($challenge);
359
$ntlm_res = $ntlm_client->NTLMResponse(
360
substr($challenge, 24, 8),
364
$msg3 = $ntlm_client->TypeMsg3(
370
// send encoded username
371
return $this->sendCommand('Username', base64_encode($msg3), 235);
374
// Start authentication
375
if (!$this->sendCommand('AUTH CRAM-MD5', 'AUTH CRAM-MD5', 334)) {
379
$challenge = base64_decode(substr($this->last_reply, 4));
381
// Build the response
382
$response = $username . ' ' . $this->hmac($challenge, $password);
384
// send encoded credentials
385
return $this->sendCommand('Username', base64_encode($response), 235);
392
* Calculate an MD5 HMAC hash.
393
* Works like hash_hmac('md5', $data, $key)
394
* in case that function is not available
395
* @param string $data The data to hash
396
* @param string $key The key to hash with
400
protected function hmac($data, $key)
402
if (function_exists('hash_hmac')) {
403
return hash_hmac('md5', $data, $key);
406
// The following borrowed from
407
// http://php.net/manual/en/function.mhash.php#27225
409
// RFC 2104 HMAC implementation for php.
410
// Creates an md5 HMAC.
411
// Eliminates the need to install mhash to compute a HMAC
412
// Hacked by Lance Rushing
414
$b = 64; // byte length for md5
415
if (strlen($key) > $b) {
416
$key = pack('H*', md5($key));
418
$key = str_pad($key, $b, chr(0x00));
419
$ipad = str_pad('', $b, chr(0x36));
420
$opad = str_pad('', $b, chr(0x5c));
421
$k_ipad = $key ^ $ipad;
422
$k_opad = $key ^ $opad;
424
return md5($k_opad . pack('H*', md5($k_ipad . $data)));
428
* Check connection state.
430
* @return bool True if connected.
432
public function connected()
434
if (!empty($this->smtp_conn)) {
435
$sock_status = stream_get_meta_data($this->smtp_conn);
436
if ($sock_status['eof']) {
437
// the socket is valid but we are not connected
438
if ($this->do_debug >= 1) {
440
'SMTP -> NOTICE: EOF caught while checking if connected'
446
return true; // everything looks good
452
* Close the socket and clean up the state of the class.
453
* Don't use this function without first trying to use QUIT.
458
public function close()
460
$this->error = null; // so there is no confusion
461
$this->helo_rply = null;
462
if (!empty($this->smtp_conn)) {
463
// close the connection and cleanup
464
fclose($this->smtp_conn);
465
$this->smtp_conn = 0;
470
* Send an SMTP DATA command.
471
* Issues a data command and sends the msg_data to the server,
472
* finializing the mail transaction. $msg_data is the message
473
* that is to be send with the headers. Each header needs to be
474
* on a single line followed by a <CRLF> with the message headers
475
* and the message body being separated by and additional <CRLF>.
476
* Implements rfc 821: DATA <CRLF>
477
* @param string $msg_data Message data to send
481
public function data($msg_data)
483
if (!$this->sendCommand('DATA', 'DATA', 354)) {
487
/* The server is ready to accept data!
488
* according to rfc821 we should not send more than 1000
490
* characters on a single line so we will break the data up
491
* into lines by \r and/or \n then if needed we will break
492
* each of those into smaller lines to fit within the limit.
493
* in addition we will be looking for lines that start with
494
* a period '.' and append and additional period '.' to that
495
* line. NOTE: this does not count towards limit.
498
// Normalize the line breaks before exploding
499
$msg_data = str_replace("\r\n", "\n", $msg_data);
500
$msg_data = str_replace("\r", "\n", $msg_data);
501
$lines = explode("\n", $msg_data);
503
/* We need to find a good way to determine if headers are
504
* in the msg_data or if it is a straight msg body
505
* currently I am assuming rfc822 definitions of msg headers
506
* and if the first field of the first line (':' separated)
507
* does not contain a space then it _should_ be a header
508
* and we can process all lines before a blank "" line as
512
$field = substr($lines[0], 0, strpos($lines[0], ':'));
514
if (!empty($field) && !strstr($field, ' ')) {
518
//RFC 2822 section 2.1.1 limit
519
$max_line_length = 998;
521
foreach ($lines as $line) {
523
if ($line == '' && $in_headers) {
526
// ok we need to break this line up into several smaller lines
527
while (strlen($line) > $max_line_length) {
528
$pos = strrpos(substr($line, 0, $max_line_length), ' ');
530
// Patch to fix DOS attack
532
$pos = $max_line_length - 1;
533
$lines_out[] = substr($line, 0, $pos);
534
$line = substr($line, $pos);
536
$lines_out[] = substr($line, 0, $pos);
537
$line = substr($line, $pos + 1);
540
/* If processing headers add a LWSP-char to the front of new line
541
* rfc822 on long msg headers
544
$line = "\t" . $line;
547
$lines_out[] = $line;
549
// send the lines to the server
550
while (list(, $line_out) = @each($lines_out)) {
551
if (strlen($line_out) > 0) {
552
if (substr($line_out, 0, 1) == '.') {
553
$line_out = '.' . $line_out;
556
$this->client_send($line_out . self::CRLF);
560
// Message data has been sent, complete the command
561
return $this->sendCommand('DATA END', '.', 250);
565
* Send an SMTP HELO or EHLO command.
566
* Used to identify the sending server to the receiving server.
567
* This makes sure that client and server are in a known state.
568
* Implements from RFC 821: HELO <SP> <domain> <CRLF>
570
* @param string $host The host name or IP to connect to
574
public function hello($host = '')
576
// Try extended hello first (RFC 2821)
577
if (!$this->sendHello('EHLO', $host)) {
578
if (!$this->sendHello('HELO', $host)) {
587
* Send an SMTP HELO or EHLO command.
588
* Low-level implementation used by hello()
590
* @param string $hello The HELO string
591
* @param string $host The hostname to say we are
595
protected function sendHello($hello, $host)
597
$noerror = $this->sendCommand($hello, $hello . ' ' . $host, 250);
598
$this->helo_rply = $this->last_reply;
603
* Send an SMTP MAIL command.
604
* Starts a mail transaction from the email address specified in
605
* $from. Returns true if successful or false otherwise. If True
606
* the mail transaction is started and then one or more recipient
607
* commands may be called followed by a data command.
608
* Implements rfc 821: MAIL <SP> FROM:<reverse-path> <CRLF>
609
* @param string $from Source address of this message
613
public function mail($from)
615
$useVerp = ($this->do_verp ? ' XVERP' : '');
616
return $this->sendCommand(
618
'MAIL FROM:<' . $from . '>' . $useVerp,
624
* Send an SMTP QUIT command.
625
* Closes the socket if there is no error or the $close_on_error argument is true.
626
* Implements from rfc 821: QUIT <CRLF>
627
* @param bool $close_on_error Should the connection close if an error occurs?
631
public function quit($close_on_error = true)
633
$noerror = $this->sendCommand('QUIT', 'QUIT', 221);
634
$e = $this->error; //Save any error
635
if ($noerror or $close_on_error) {
637
$this->error = $e; //Restore any error from the quit command
643
* Send an SMTP RCPT command.
644
* Sets the TO argument to $to.
645
* Returns true if the recipient was accepted false if it was rejected.
646
* Implements from rfc 821: RCPT <SP> TO:<forward-path> <CRLF>
647
* @param string $to The address the message is being sent to
651
public function recipient($to)
653
return $this->sendCommand(
655
'RCPT TO:<' . $to . '>',
661
* Send an SMTP RSET command.
662
* Abort any transaction that is currently in progress.
663
* Implements rfc 821: RSET <CRLF>
665
* @return bool True on success.
667
public function reset()
669
return $this->sendCommand('RSET', 'RSET', 250);
673
* Send a command to an SMTP server and check its return code.
674
* @param string $command The command name - not sent to the server
675
* @param string $commandstring The actual command to send
676
* @param int|array $expect One or more expected integer success codes
678
* @return bool True on success.
680
protected function sendCommand($command, $commandstring, $expect)
682
if (!$this->connected()) {
683
$this->error = array(
684
"error" => "Called $command without being connected"
688
$this->client_send($commandstring . self::CRLF);
690
$reply = $this->get_lines();
691
$code = substr($reply, 0, 3);
693
if ($this->do_debug >= 2) {
694
$this->edebug('SMTP -> FROM SERVER:' . $reply);
697
if (!in_array($code, (array)$expect)) {
698
$this->last_reply = null;
699
$this->error = array(
700
"error" => "$command command failed",
701
"smtp_code" => $code,
702
"detail" => substr($reply, 4)
704
if ($this->do_debug >= 1) {
706
'SMTP -> ERROR: ' . $this->error['error'] . ': ' . $reply
712
$this->last_reply = $reply;
718
* Send an SMTP SAML command.
719
* Starts a mail transaction from the email address specified in $from.
720
* Returns true if successful or false otherwise. If True
721
* the mail transaction is started and then one or more recipient
722
* commands may be called followed by a data command. This command
723
* will send the message to the users terminal if they are logged
724
* in and send them an email.
725
* Implements rfc 821: SAML <SP> FROM:<reverse-path> <CRLF>
726
* @param string $from The address the message is from
730
public function sendAndMail($from)
732
return $this->sendCommand("SAML", "SAML FROM:$from", 250);
736
* Send an SMTP VRFY command.
737
* @param string $name The name to verify
741
public function verify($name)
743
return $this->sendCommand("VRFY", "VRFY $name", array(250, 251));
747
* Send an SMTP NOOP command.
748
* Used to keep keep-alives alive, doesn't actually do anything
752
public function noop()
754
return $this->sendCommand("NOOP", "NOOP", 250);
758
* Send an SMTP TURN command.
759
* This is an optional command for SMTP that this class does not support.
760
* This method is here to make the RFC821 Definition
761
* complete for this class and __may__ be implemented in future
762
* Implements from rfc 821: TURN <CRLF>
766
public function turn()
768
$this->error = array(
769
'error' => 'The SMTP TURN command is not implemented'
771
if ($this->do_debug >= 1) {
772
$this->edebug('SMTP -> NOTICE: ' . $this->error['error']);
778
* Send raw data to the server.
779
* @param string $data The data to send
781
* @return int|bool The number of bytes sent to the server or FALSE on error
783
public function client_send($data)
785
if ($this->do_debug >= 1) {
786
$this->edebug("CLIENT -> SMTP: $data");
788
return fwrite($this->smtp_conn, $data);
792
* Get the latest error.
796
public function getError()
802
* Get the last reply from the server.
806
public function getLastReply()
808
return $this->last_reply;
812
* Read the SMTP server's response.
813
* Either before eof or socket timeout occurs on the operation.
814
* With SMTP we can tell if we have more lines to read if the
815
* 4th character is '-' symbol. If it is a space then we don't
816
* need to read anything else.
820
protected function get_lines()
824
// If the connection is bad, give up now
825
if (!is_resource($this->smtp_conn)) {
828
stream_set_timeout($this->smtp_conn, $this->Timeout);
829
if ($this->Timelimit > 0) {
830
$endtime = time() + $this->Timelimit;
832
while (is_resource($this->smtp_conn) && !feof($this->smtp_conn)) {
833
$str = @fgets($this->smtp_conn, 515);
834
if ($this->do_debug >= 4) {
835
$this->edebug("SMTP -> get_lines(): \$data was \"$data\"");
836
$this->edebug("SMTP -> get_lines(): \$str is \"$str\"");
839
if ($this->do_debug >= 4) {
840
$this->edebug("SMTP -> get_lines(): \$data is \"$data\"");
842
// if 4th character is a space, we are done reading, break the loop
843
if (substr($str, 3, 1) == ' ') {
846
// Timed-out? Log and break
847
$info = stream_get_meta_data($this->smtp_conn);
848
if ($info['timed_out']) {
849
if ($this->do_debug >= 4) {
851
'SMTP -> get_lines(): timed-out (' . $this->Timeout . ' sec)'
856
// Now check if reads took too long
858
if (time() > $endtime) {
859
if ($this->do_debug >= 4) {
861
'SMTP -> get_lines(): timelimit reached ('
862
. $this->Timelimit . ' sec)'
873
* Enable or disable VERP address generation.
874
* @param bool $enabled
876
public function setVerp($enabled = false)
878
$this->do_verp = $enabled;
882
* Get VERP address generation mode.
885
public function getVerp()
887
return $this->do_verp;
891
* Set debug output method.
892
* @param string $method The function/method to use for debugging output.
894
public function setDebugOutput($method = 'echo')
896
$this->Debugoutput = $method;
900
* Get debug output method.
903
public function getDebugOutput()
905
return $this->Debugoutput;
909
* Set debug output level.
912
public function setDebugLevel($level = 0)
914
$this->do_debug = $level;
918
* Get debug output level.
921
public function getDebugLevel()
923
return $this->do_debug;
928
* @param int $timeout
930
public function setTimeout($timeout = 0)
932
$this->Timeout = $timeout;
939
public function getTimeout()
941
return $this->Timeout;