[cobalt-users] SMTP hole maybe - any ideas

["Ian" <ian@xxxxxxxxxxxxxxxxxxxx>]

Hi Guys,

Came across what seems like a weird exploit, which I am not sure is across all, or just
generic to us.

If we send an email to an email address that is located on our raq3 and send it from
another email address that is also on the same raq3, then it is relayed without any
prevention what so ever and without any POP3 account being polled as per the pop b4 smtp
system.

It seems that if a person knows of domains on a server, they could send emails purporting
to come from other users on the ssame server without any problem what so ever.

Anyone heard of this before and can they do it maybe....

Thanks

Mac