Hello all, I followed the guide on here to setup a Mail server (debian, postfix, virtual etc...) Now im trying to get TLS to work. Im trying to send an email to a server that is TLS aware and i get this error in my log and the email is deferred. So to try and fix this, i went to verisign website and downloaded the root.zip file that contains all the root CA PEM's. I then appended all the verisign PEM's in that zip file to my CAcert.pem on my debian machine. I then added this line into my postfix main.cf file then reloaded postfix, but i still get the same error in my mail.log I dont have a real certificate for my server, its a self signed cert. Would that cause this problem? My tls section in my main.cf looks like this Thanks for your help!!.