On Thu, 04 Oct 2001 10:33:44 EDT, Michael Sailer <[log in to unmask]>  said:
> Any ideas as to why I would get this message after I start Listserv and send
> an email to it? Below the error message is a copy of my aliases file.
>
> Thanks
>
> ----- The following addresses had permanent fatal errors -----
> <[log in to unmask]>
>
>    ----- Transcript of session follows -----
> 553 datacom-equipment.com. config error: mail loops back to me (MX problem?)
> 554 <[log in to unmask]>... Local configuration error

You have the MX for 'datacom-equipment.com' pointing to some machine. We'll
call it foo.datacom-equipment.com.  However, 'foo' has not been told to accept
mail for this address (and it won't, because foo.datacom-equipment.com and
datacom-equipment.com are 2 different hostnames.  So it tries to find the
host that it thinks *should* be getting the mail - and discovers that the
MX is pointing at itself (meaning that the DNS thinks IT should be handling
the mail).

For Sendmail, the cure is to add 'datacom-equipment.com' to either the
Cw macro, or use a Fw file (default is /etc/mail/local-host-names in
Sendmail 8.11 and later).

If that doesn't help, and you're running Sendmail, let me know.