smtp server change port

[Blackfort]

Hello,
I'm trying to change the port of the smtp server.
see attachments this is in defaults.inc.php and added it in config.inc.php.
but they both didnt work still getting a error when trying to send it.

[Dmitry42]

Need check logs.

Another idea:

1. Try ssl://fullhostname:587. Here "fullhostname" - name from your SSL certs.
2. Try tls://fullhostname:587
3. If RC and SMTP on the same server you can try 'localhost:25'