If you need a simple MTA that will send mail across the internet, sendmail is a commonly used provider. It ships with most linux distributions and can be configured with relative ease. The other competing out of the box solution is postifix. Which on to pick? Probably postfix, but I was in a hurry and dived in to how to configure sendmail first. I guess eventually I’ll get around to setting up postfix.
Open up the sendmail configuration file:
[root@bedrock ~]# vi /etc/mail/sendmail.mc
Uncomment the flag that bars accepting unresolvable domains:
dnl # We strongly recommend not accepting unresolvable…
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