shanet's questions

I'm new to the world of mail server's and have been working on setting up my own via Postfix on Ubuntu 11.10. So far, I have SASL authentication working over TLS so that's good; I'm worrying about security now.

In short: I want Postfix to accept all unauthenticated incoming mail, but only allow authenticated outgoing mail. This also makes me wonder if I have STARTTLS and TLS support on ports 465 and 587, do I still need to listen on port 25? Will mail servers try to deliver mail on port 587 if 25 is closed?

But back to the allow unauthenticated incoming, but only authenticated outgoing, I tried adding

-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject

to the smtp line in my master.cf file, but then that blocks unauthenticated incoming mail. Is there a way to only allow incoming on port 25, and leave ports 465/587 for outgoing only?

I'm not sure what good it would do, but I can post the rest of my config if necessary. Any help is greatly appreciated since I'm new to all this and it's still confusing. Thank you!

I am trying to set up mail forwarding on a new server of mine. For example, I want [email protected] to forward all email sent to it to, say, [email protected]. I do not need/want to be able to send mail from mydomain.

I'm running Ubuntu 10.04 and it's my server so I have root access and can install/modify anything necessary. I have a few years of Linux experience, but never played with mail servers before so I literally know nothing about them. Hence, I can't really understand all the questions that have been previously asked about this topic. There also seems to be many different answers given and it would take forever to read about every solution proposed. That being said, can anyone point me in the right direction on how to accomplish this? Thank you!