I am having a strange problem with my IMail server.
Users in virtual IPless domains cannot receive mail
from some servers. Let's say host.maindomain.com is
my server, and [EMAIL PROTECTED] is a user on a
virtual IPless domain on my server. Most e-mail for
this user goes through. I can send e-mail to this user
from the maindomain. If you look in the logs, a normal
message being sent to the user will happen like so:

EHOL remotemailserver.remotedomain.com
MAIL FROM: [EMAIL PROTECTED]
RCPT TO: [EMAIL PROTECTED]

Here the message would reach the user just fine.

How ever, some e-mail servers are doing something very
strange when trying to deliver a message to this user.
The one I am seeing the most is aol.com. Their message
server would cause the following events in the log:

EHLO imo-m01.mx.aol.com
MAIL FROM: [EMAIL PROTECTED]
RCPT TO: [EMAIL PROTECTED]
ERR host.maindomain.com invalid user <[EMAIL PROTECTED]

So you see, some mail servers are replacing the
@virtualdom.com with the actual host name of the
server. This is of course causing an invalid user
error message, as vuser is @virtualdom.com, not
@host.maindomain.com.

I have read through the knowledge base and double
checked all the settings on the server. For the
virtualdom there is an MX record pointing to
host.maindomain.com. In the virtualdom's config there
is an alias for virtualdom.com. Things seems to be
setup right for the most part, as at least 80% of the
user's messages make it through. The user can send
messages just fine. It is just a small number of mail
servers that are causing this problem.

So, how can I fix this problem? What have I over looked?
Your help in this matter is greatly appreciated! I
have gone through my server configs several times
and still can't find the problem!! I have searched
the knowledge base with no luck.

-Greg Curry
Teamwork System Admin

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