Alias loop problem, help

[aditya at superman.cs.uh.edu]

I have a problem with mail set up. We have a mailhost within yellow pages
domain. In this domain we have a aliases file which forwards some mail of
a selected group of users to a standalone system (this machines is outside
the yellow page domain) which is not running yellow pages and has own set
of users, it is however configured has a mail subsidiary of the mailhost,
with the appropriate sendmail.cf file.

At a random time, when some mail is sent from the yp domain to users whose
mail is forwarded to the standalone system, the mail does not reach there,
and there mailer-daemon comes back with following message:

  ---Transcript of session follows---
554 <adt at geoquest.com....Mail loop detected
554 sendall: too many hops (30 max)

Then there are 30 headers showing two-way communication between the two
machines. For some reason the standalone system does not accept thew mail.

Irritating message on the console: SYSRR and SENDALL.

I am working with a sun-engineer for the past three weeks, but no luck. I
would appreciate some sun-managers help & views as to what is the problem.

thanks
adity at cs.uh.com
Phone:713-952-2100
Ad. Talwar