Server to Server TLS encryption?

[Theodotos Andreou]

Hi guys,

I went through the TLS Readme but I couldn't find a clear answer to the 
following question:

Can you configure postfix in a way that it connects using TLS to another 
SMTP server, if TLS is available on the other side? For example if the 
destination server supports TLS then postfix opens a TLS connection to it.

Further more can this be done even if you have a self-signed certificate 
on the destination?

Thanks