php-swiftmailerHow to use TLS 1.2 with Swiftmailer?

Swiftmailer supports TLS 1.2 for secure connections. To use TLS 1.2 with Swiftmailer, you need to set the encryption option to tls and the tls option to tlsv1.2 when creating the transport.

$transport = (new Swift_SmtpTransport('smtp.example.org', 465, 'ssl'))
  ->setUsername('your username')
  ->setPassword('your password')
  ->setEncryption('tls')
  ->setStreamOptions(array('ssl' => array('allow_self_signed' => true, 'verify_peer_name' => false, 'verify_peer' => false, 'tlsv1.2' => true)));

The output of the above code should be a transport object that is configured to use TLS 1.2.

Code explanation

• $transport: This is the transport object that will be used to send emails.
• Swift_SmtpTransport: This is the class used to create the transport object.
• smtp.example.org: This is the SMTP server address.
• 465: This is the port used for SMTP connections.
• ssl: This is the encryption type used for SMTP connections.
• setUsername and setPassword: These methods are used to set the username and password for the SMTP server.
• setEncryption: This method is used to set the encryption type to tls.
• setStreamOptions: This method is used to set the tlsv1.2 option to true.

Helpful links

• Swiftmailer Documentation
• PHP Manual - Swift_SmtpTransport

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