In response to Sebastian Stark:
> but, as you see, the Message-Id in my messages do not contain the FQDN of thi
> s
> host. Instead, they look like <somenumber@gosh>. What is wrong with my
> configure file?
Nichts. The message-ID is being set by your MUA, which appears to be
mutt. This needs to be re-configured -- I think you need a "set
hostname" command in your own .muttrc or (preferably) in
/usr/local/etc/Muttrc .