Subject does most of the work here, but I'll expand. [edit] Maybe if I had just RTFM'd harder I would've found my answers... I think this will help, but leaving the post up in case anybody else has ...

I have an Asterisk server. It sends out an email whenever a voicemail is received. It uses the system's default MTA to accomplish this. My ISP blocks port 25, so I setup a relay host to an alternative ...

With many types of business email accounts, your computer connects to a machine called the Simple Mail Transfer Protocol server when you send messages. If you have difficulty sending messages, there ...