RE: [cobalt-users] Is my server being used

["Dan Kriwitsky" <webhosting@xxxxxxxxx>]

>
> I believe Sendmail will append the machine name to what's found
> in the From
> header whenever it doesn't include a domain name.  This is done
> so that when
> a local user sends an email from the server shell an email address is used
> which can be replied to by non-local users.  Since email programs let the
> user supply any From address the user wants it's likely that the person
> sending the spam used "_XxHustlerxX_" as the From address with no domain
> name attached.  To all but your most sophisticated users it will
> appear that
> the message was sent from your machine (and to them it probably appears to
> be from the server admin if it's the machine name that's
> attached), but the
> rest of the headers tell the true story.
>

My RaQ2 will reject mail if there is no domain name in the From: header.
Response 553 Domain Name Required

I tried a To: me@xxxxxxxxxxxx and a Bcc: me@xxxxxxxxxxxx using the SMTP on
my server and another server. Neither were delivered with a From: that
didn't have @domain.com.

--
Dan Kriwitsky