SMTP Port availability

Is there any option to add specific SMTP port, my smtp server port is 443, and the available ports are only three port 25, 465, and 587.
I am using the latest version of Manager and my system is windows 11

thank you

These are the only ports available for SMTP. Port 443 is never used for SMTP as it is an SSL / TCP port. Your email hosting provider would be able to tell you which SMTP port to use.

thank you, I will check with them

Saying “the latest version of Manager” is ambiguous

You need to state the edition (cloud, server, desktop) and the version number

I have the latest desktop version 23.11.23.1158

thank you

I already explained that Port 443 is never used for SMTP and I hope that you managed to get a response from your mail hosting provider what port to use.