Jamie wrote ...
>
> $ host mailgate.compuserve.com
> mailgate.compuserve.com is a nickname for mx3.compuserve.com
> mx3.compuserve.com has address 149.174.206.135
> mx3.compuserve.com has address 149.174.177.136
> mx3.compuserve.com has address 149.174.217.133
> mx3.compuserve.com has address 149.174.217.137
> mx3.compuserve.com has address 149.174.217.136
> mx3.compuserve.com has address 149.174.217.135
> mx3.compuserve.com has address 149.174.177.134
> mx3.compuserve.com has address 149.174.177.133
> mx3.compuserve.com has address 149.174.206.137
> mx3.compuserve.com has address 149.174.206.136
Make the DontExpandCnames option true in your /etc/sendmail.cf, and when
customers start bitching that they can't send mail to CompuServe addresses,
tell them that it is CIS's fault, and give them the CIS customer service
number 
Rob