SMTP wrong version number (Postmark)

[XFFA.IR Bot]

Hi,

I'm getting this error when trying to use Postmark:

Code:

Symfony\Component\Mailer\Exception\TransportException: Email to ********@gmail.com from forum@******.com failed: Connection could not be established with host "ssl://smtp.postmarkapp.com:25": stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:0A00010B:SSL routines::wrong version number
src/vendor/symfony/mailer/Transport/Smtp/Stream/SocketStream.php:154
Generated by: Unknown account

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