Question

Wordpress SMTP connect() failed.

Posted December 31, 2014 17k views

English: Error on trying to configure SMTP mails on Wordpress. On the debug message below i’m using the WP Mail SMTP plugin, the others only shows SMTP connect() failed..
Português: Erro ao tentar configurar emails SMTP no Wordpress. Na mensagem abaixo estou usando o plugin WP Mail SMTP, os outros só mostram SMTP connect() failed..

Test Message Sent

The result was:
bool(false)
The full debugging output is shown below:
object(PHPMailer)#6308 (69) {
  ["Version"]=>
  string(5) "5.2.7"
  ["Priority"]=>
  int(3)
  ["CharSet"]=>
  string(5) "UTF-8"
  ["ContentType"]=>
  string(10) "text/plain"
  ["Encoding"]=>
  string(4) "8bit"
  ["ErrorInfo"]=>
  string(22) "SMTP connect() failed."
  ["From"]=>
  string(18) "vluzrmos@gmail.com"
  ["FromName"]=>
  string(15) "Vagner do Carmo"
  ["Sender"]=>
  string(18) "vluzrmos@gmail.com"
  ["ReturnPath"]=>
  string(0) ""
  ["Subject"]=>
  string(53) "WP Mail SMTP: Test mail to vagnerluzdocarmo@gmail.com"
  ["Body"]=>
  string(68) "This is a test email generated by the WP Mail SMTP WordPress plugin."
  ["AltBody"]=>
  string(0) ""
  ["Ical"]=>
  string(0) ""
  ["MIMEBody":protected]=>
  string(69) "This is a test email generated by the WP Mail SMTP WordPress plugin.
"
  ["MIMEHeader":protected]=>
  string(450) "Date: Wed, 31 Dec 2014 08:17:52 +0000
Return-Path: 
To: vagnerluzdocarmo@gmail.com
From: Vagner do Carmo 
Subject: WP Mail SMTP: Test mail to vagnerluzdocarmo@gmail.com
Message-ID: <6ea4d4465a43398faddaecfbcc638ba1@blog.vluzrmos.com.br>
X-Priority: 3
X-Mailer: PHPMailer 5.2.7 (https://github.com/PHPMailer/PHPMailer/)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

"
  ["mailHeader":protected]=>
  string(0) ""
  ["WordWrap"]=>
  int(0)
  ["Mailer"]=>
  string(4) "smtp"
  ["Sendmail"]=>
  string(18) "/usr/sbin/sendmail"
  ["UseSendmailOptions"]=>
  bool(true)
  ["PluginDir"]=>
  string(0) ""
  ["ConfirmReadingTo"]=>
  string(0) ""
  ["Hostname"]=>
  string(0) ""
  ["MessageID"]=>
  string(0) ""
  ["MessageDate"]=>
  string(0) ""
  ["Host"]=>
  string(14) "smtp.gmail.com"
  ["Port"]=>
  string(3) "465"
  ["Helo"]=>
  string(0) ""
  ["SMTPSecure"]=>
  string(3) "ssl"
  ["SMTPAuth"]=>
  bool(true)
  ["Username"]=>
  string(18) "vluzrmos@gmail.com"
  ["Password"]=>
  string(8) "[hidden]"
  ["AuthType"]=>
  string(0) ""
  ["Realm"]=>
  string(0) ""
  ["Workstation"]=>
  string(0) ""
  ["Timeout"]=>
  int(10)
  ["SMTPDebug"]=>
  bool(true)
  ["Debugoutput"]=>
  string(4) "echo"
  ["SMTPKeepAlive"]=>
  bool(false)
  ["SingleTo"]=>
  bool(false)
  ["SingleToArray"]=>
  array(0) {
  }
  ["do_verp"]=>
  bool(false)
  ["AllowEmpty"]=>
  bool(false)
  ["LE"]=>
  string(1) "
"
  ["DKIM_selector"]=>
  string(0) ""
  ["DKIM_identity"]=>
  string(0) ""
  ["DKIM_passphrase"]=>
  string(0) ""
  ["DKIM_domain"]=>
  string(0) ""
  ["DKIM_private"]=>
  string(0) ""
  ["action_function"]=>
  string(0) ""
  ["XMailer"]=>
  string(0) ""
  ["smtp":protected]=>
  object(SMTP)#6307 (12) {
    ["Version"]=>
    string(5) "5.2.7"
    ["SMTP_PORT"]=>
    int(25)
    ["CRLF"]=>
    string(2) "
"
    ["do_debug"]=>
    bool(true)
    ["Debugoutput"]=>
    string(4) "echo"
    ["do_verp"]=>
    bool(false)
    ["Timeout"]=>
    int(10)
    ["Timelimit"]=>
    int(30)
    ["smtp_conn":protected]=>
    bool(false)
    ["error":protected]=>
    NULL
    ["helo_rply":protected]=>
    NULL
    ["last_reply":protected]=>
    string(0) ""
  }
  ["to":protected]=>
  array(1) {
    [0]=>
    array(2) {
      [0]=>
      string(26) "vagnerluzdocarmo@gmail.com"
      [1]=>
      string(0) ""
    }
  }
  ["cc":protected]=>
  array(0) {
  }
  ["bcc":protected]=>
  array(0) {
  }
  ["ReplyTo":protected]=>
  array(0) {
  }
  ["all_recipients":protected]=>
  array(1) {
    ["vagnerluzdocarmo@gmail.com"]=>
    bool(true)
  }
  ["attachment":protected]=>
  array(0) {
  }
  ["CustomHeader":protected]=>
  array(0) {
  }
  ["lastMessageID":protected]=>
  string(55) "<6ea4d4465a43398faddaecfbcc638ba1@blog.vluzrmos.com.br>"
  ["message_type":protected]=>
  string(5) "plain"
  ["boundary":protected]=>
  array(3) {
    [1]=>
    string(35) "b1_6ea4d4465a43398faddaecfbcc638ba1"
    [2]=>
    string(35) "b2_6ea4d4465a43398faddaecfbcc638ba1"
    [3]=>
    string(35) "b3_6ea4d4465a43398faddaecfbcc638ba1"
  }
  ["language":protected]=>
  array(18) {
    ["authenticate"]=>
    string(35) "SMTP Error: Could not authenticate."
    ["connect_host"]=>
    string(43) "SMTP Error: Could not connect to SMTP host."
    ["data_not_accepted"]=>
    string(30) "SMTP Error: data not accepted."
    ["empty_message"]=>
    string(18) "Message body empty"
    ["encoding"]=>
    string(18) "Unknown encoding: "
    ["execute"]=>
    string(19) "Could not execute: "
    ["file_access"]=>
    string(23) "Could not access file: "
    ["file_open"]=>
    string(33) "File Error: Could not open file: "
    ["from_failed"]=>
    string(35) "The following From address failed: "
    ["instantiate"]=>
    string(36) "Could not instantiate mail function."
    ["invalid_address"]=>
    string(15) "Invalid address"
    ["mailer_not_supported"]=>
    string(25) " mailer is not supported."
    ["provide_address"]=>
    string(54) "You must provide at least one recipient email address."
    ["recipients_failed"]=>
    string(45) "SMTP Error: The following recipients failed: "
    ["signing"]=>
    string(15) "Signing Error: "
    ["smtp_connect_failed"]=>
    string(22) "SMTP connect() failed."
    ["smtp_error"]=>
    string(19) "SMTP server error: "
    ["variable_set"]=>
    string(30) "Cannot set or reset variable: "
  }
  ["error_count":protected]=>
  int(2)
  ["sign_cert_file":protected]=>
  string(0) ""
  ["sign_key_file":protected]=>
  string(0) ""
  ["sign_key_pass":protected]=>
  string(0) ""
  ["exceptions":protected]=>
  bool(true)
}
The SMTP debugging output is shown below:
SMTP -> ERROR: Failed to connect to server: Connection timed out (110)

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4 answers

Try from the command line:
service sendmail start

Or:
/bin/systemctl start sendmail.service

What happens if you try to send a mail manually from the command line?

For example:
https://workaround.org/ispmail/lenny/test-mail-through-telnet
Or
http://exchange.mvps.org/smtp_frames.htm

This way you can test if SNMP is actually working from your machine.
If it is, then its a local config / service issue.

Infact,
Try:
telnet localhost 25

Does it show something like?
[root@mail sdfsdfsdf.com]# telnet localhost 25
Trying 127.0.0.1…
Connected to localhost.
Escape character is ’^]’.
220 mail.dsfsfsdfsf.com ESMTP Sendmail 8.14.7/8.14.7; Wed, 31 Dec 2014 09:00:18 GMT
quit
221 2.0.0 mail.sdfsfsdfsdf.com closing connection
Connection closed by foreign host.

If so, Then your local SMTP server is ok..

I cant not send test mail with plugins wp mail smtp:
*Test Message Sent
The result was:
bool(false)
The full debugging output is shown below:
PHPMailer Object
(
[Version] => 5.2.22
[Priority] =>
[CharSet] => UTF-8
[ContentType] => text/plain
[Encoding] => 7bit
[ErrorInfo] => SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
[From] => duannhadatsaigon@gmail.com
[FromName] => Nhà Đất Sài Gòn
[Sender] =>
[ReturnPath] =>
[Subject] => WP Mail SMTP: Test mail to nghiadv.it@gmail.com
[Body] => This is a test email generated by the WP Mail SMTP WordPress plugin.
[AltBody] =>
[Ical] =>
[MIMEBody:protected] => This is a test email generated by the WP Mail SMTP WordPress plugin.

[MIMEHeader:protected] => Date: Wed, 29 Nov 2017 06:07:28 +0000

To: nghiadv.it@gmail.com
From: =?UTF-8?B?TmjDoCDEkOG6pXQgU8OgaSBHw7Ju?=
Subject: WP Mail SMTP: Test mail to nghiadv.it@gmail.com
Message-ID:
X-Mailer: PHPMailer 5.2.22 (https://github.com/PHPMailer/PHPMailer)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8

For example:
http://duannhadatsaigon.com/

Hello all,

What I could suggest here is using an SMTP plugin for your WordPress site.

That way you will be able to specify an SMTP server with authentication which your emails would be going through. You could for example use SendGrid’s SMTP service. This would drastically increase the delivery rate of your emails as well compared to using plain PHP mail.

I’ve been using this plugin for a while now and it works very well: Easy WP SMTP.

https://www.digitalocean.com/community/tutorials/how-to-get-wordpress-email-notifications-on-a-digitalocean-droplet

Hope that this helps!
Regards,
Alex

by Lyn Muldrow
Sending emails and notifications including form submit verifications and password resets from your WordPress server or Droplet is an essential function. In this tutorial, learn how to use a WordPress Simple Mail Transfer Protocol (SMTP) plugin to send emails from your WordPress Droplet or server.