sending mail to a server alias from a local email account doesn't work

[m.roth at 5-cent.us]

I forget who wrote (I *loathe* webmail, that doesn't copy that...):
>Dave wrote:
>
>> I configured sendmail on RHEL 5.4.
>> I can send mail when I'm logged into the RHEL machine to
>> root at hostname.llnl.gov
>> and I recieve the mail in my Thunderbird inbox since I have
>> root defined in /etc/aliases to go to martini1 at llnl.gov.
>
>> But when I try to send a message from my Thunderbird inbox
>> email system on a different machine to root at hostname.llnl.gov
>> I never receive it.
<snip>
> As someone else wisely suggested, the logs on both the sending mail server
> (whatever thunderbird is talking to) and your would-be receiving server
> are the place to start.  I would also add that it's somewhat likely that
> the llnl.gov mail server is configured to accept *@*.llnl.gov as local to
> itself, so it may never try to resolve your hostname and deliver the
> message.

There's a possibility that it's filtering out email to/from root.

          mark