[BlueOnyx:13179] Sendmail excessive recursion on a customer server

[Chris Gebhardt - VIRTBIZ Internet]

We are trying to assist a customer with email trouble on his domain, and 
not having much luck.   The issue revolves around the dreaded old 5.0.0 
rewrite: excessive recursion.    We're usually able to address these 
issues quickly enough by paying some attention to the DNS.   This time, 
not so much.

Using the information in this post:
http://mail.blueonyx.it/pipermail/blueonyx/2009-February/000601.html

we have verified:
1: DNS is pointed to the customer server
2: Domain contains a valid MX record, which is directed to a valid A record
3: Domain "Email Server Alias" includes just the domain name


Advice/ideas are welcome.

The domain in question:
forgruene.com

Example user:
test-user

some interesting diagnostics:
# sendmail -bv test-user at forgruene.com
rewrite: excessive recursion (max 50), ruleset canonify
rewrite: excessive recursion (max 50), ruleset parse
test-user at forgruene.com... User unknown

# sendmail -bv test-user at www.forgruene.com
rewrite: excessive recursion (max 50), ruleset canonify
rewrite: excessive recursion (max 50), ruleset parse
test-user at www.forgruene.com... User unknown

# sendmail -bv test-user
test-user... deliverable: mailer local, user test-user

Help a BlueOnyx brother out?
-- 
Chris Gebhardt
VIRTBIZ Internet Services
Access, Web Hosting, Colocation, Dedicated
www.virtbiz.com | toll-free (866) 4 VIRTBIZ