I decided to change the /etc/hostname to bob.example.com (previously example.com) in order to conform more closely with the document.
http://www.postfix.org/STANDARD_CONFIGURATION_README.html I didn't think I really needed to have a hostname, because why would a single machine need to have a second name (other than the domain). but ti did seem to create some wacky defaults in the main.cf when the postfix package was installed. But the smtp_banner worries me. I want this machine to send and receive mail from a multitude of domains that I own (basically one for each of my hobbies, and a family page for a friend of the family). smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) Since $myhostname is bob.example.com and it's mandatory that it be included, would it be suspicious to the sender that mail being directed to example.org be greeted with a smtpd_banner announcing example.com. Does anybody check for this? What does the sender do with the hostname once it has it?
