php-swiftmailerHow to configure Swiftmailer for SMTP without authentication?

Swiftmailer can be configured for SMTP without authentication by setting the transport option to smtp and providing the host, port and encryption options.

$transport = (new Swift_SmtpTransport('smtp.example.com', 25))
    ->setEncryption('tls')
    ->setTimeout(30);

The host option should be set to the SMTP server address, the port option should be set to the port number of the SMTP server and the encryption option should be set to the encryption protocol used by the SMTP server.

• host: SMTP server address
• port: port number of the SMTP server
• encryption: encryption protocol used by the SMTP server

Helpful links

• Swiftmailer Documentation
• Swiftmailer SMTP Transport

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