I have all my email for one domain going through google apps, but I want to use my server for smtp-only email. I created an spf record and an A record that points to my server. My server is running Ubuntu and the lastest ISPC 3. My questions are these: 1) How do I tell which port I am using for smtp? 2) How do I tell if I'm using TLS or SSL? 3) Where do bounced emails go if the email box on my server is sending only?