[cobalt-developers] question regarding order of mail delivery attempts, re. CGI forms

["Regarding Cobalt-related issues from Albert C." <itacroft-cobalt@xxxxxxxxxxxxxxxx>]

One of our customers has several virtual domains on Cobalt RaQx servers
(RaQ, RaQ2, and RaQ3), and is asking regarding an issue he has seen on all
three with several of the domains.

Here is the problem:

-Customer has a domain, which I will call x.com for purposes of
illustration.
-The virtual site is set up as www.x.com.
-In the site settings, the domain is NOT set to accept mail for the domain,
nor has the site been set to accept mail for the domain at any point.
-A CGI on a contact page is designed to email the results of the form to an
address specified by the customer, such as joe@xxxxxx
-joe does not exist as a user on the machine.
-When the script is executed, joe@xxxxx does not receive the email, and an
error message in the system log files indicates that it could not be
delivered because the user 'joe' did not exist.
-If the CGI is set to deliver instead to joe@xxxxx, where y.com is a domain
that does not have a site on the machine, joe@xxxxx will receive the email
properly.

As best I can tell from trying to decipher the sendmail.cf file, it is
attempting to at some point rewrite the address joe@xxxxx to joe@xxxxxxxxx,
then attempt local delivery.  I am not, however, a mail guru, and so I may
be misunderstanding. If it is not to handle mail for the domain, how can I
prevent this from occurring, preferrably without voiding any warrenties?

Your time and any assistance or direction you may provide are greatly
appreciated.

Sincerely,
Albert C.