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.