Swiftmailer Gmail Connection timed out #110

Question

I want to send emails using gmail's smtp with the PHP script posted below using Swiftmailer. Now this works fine on my own webserver. But when I used it on the webserver of the people I'm creating this for, I get an exception:

    Fatal error: Uncaught exception 'Swift_TransportException' with message 'Connection could not be established with host smtp.gmail.com [Connection timed out #110]' in ...

What could be the problem? I'm assuming its got to do with the difference in server settings, because the code works on my own webserver. I've checked with phpinfo() the following:

- Registered Stream Socket Transports   tcp, udp, unix, udg, ssl, sslv3, sslv2, tls
- OpenSSL support   enabled 
- OpenSSL Library Version   OpenSSL 1.0.1e-fips 11 Feb 2013 

This is my PHP code:

    $emailname = MY_GMAIL_ACCOUNT_USERNAME;
    $emailpass = MY_GMAIL_ACCOUNT_PASSWORD;

    $transport = Swift_SmtpTransport::newInstance('smtp.gmail.com', 465, "ssl")
      ->setUsername($emailname)
      ->setPassword($emailpass);

    $mailer = Swift_Mailer::newInstance($transport);

    $message = Swift_Message::newInstance($emailtitle)
      ->setFrom(array($emailname.'@gmail.com' => $emailsender))
      ->setTo(array($emailrecp))
      ->setBody($emailbody,'text/html');

    $result = $mailer->send($message);

Solution 1

I had the same issue on a Digital Ocean server. Turns out they're blocking SMTP by default on IPv6. Here's the fix:

nano /etc/gai.conf precedence ::ffff:0:0/96 100

as per: https://www.digitalocean.com/community/questions/outgoing-connections-on-port-25-587-143-blocked-over-ipv6

Solution 2

My easy solution to avoid the problem of dynamic IP (every time i ping smtp.gmail.com I see a slight difference in the last 3digit chunk), is to simply use php built-in gethostbyname() to read the IP in real-time.

 $smtp_host_ip = gethostbyname('smtp.gmail.com');
 $transport = Swift_SmtpTransport::newInstance($smtp_host_ip,465,'ssl')
   ->setUsername('username')->setPassword('pwd');

Solution 3

Im not advanced in php and streams but it seems that IPv6 DNS resolution depends on the router and/or ISPs. I changed my provider, got a new router and the smtp connection always timed out.

To use IPv6 you should either add your own IPv6 or force stream_context_create to use IPv4. You can call setSourceIp() on a swiftmailer object or directly change the Swift_SmtpTransport class (i.e. in the constructor).

Use IPv6:

// replace IP with your own IPv6
$this->setSourceIp('2aaa:8a8:fc0:230:fds:4fd:faa:24ae');

Use IPv4 (mentioned at https://github.com/phergie/phergie/issues/195):

$this->setSourceIp('0.0.0.0');

Solution 4

just add

74.125.130.108 smtp.gmail.com

to server's hosts file

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Comments

[TheFrack]

Wow... yeah happened to me on my host too, works now, thank you!