Send Email knode with ssl

I want to send a mail with smtp host on port 25. It works without SSL, but when SSL is active it is not sending mails.
log shows: Unsupported or unrecognized SSL message".

Can someone give me a information about what version of SSL is used?

Hey @twahl,

Welcome to the community!

Have you tried changing the port from 25 to 465?

Here is a thread that may be helpful:

Hope this helps,