[Pkg-exim4-users] Spam sent to user from user's email address

[Marc Haber]

On Thu, Jan 13, 2011 at 08:00:19AM +0000, Peter Sparkes wrote:
> My Exim4 users are getting spam sent to them which appear to come from
> there own email address.

That's normal.

> Assuming that these emails are originating from my exim server

Most probably wrong assumption.

If you _know_ that none of your users are using their mail address as
sender for messages that are delivered via other SMTP servers, you can
block messages with sender addresses from your domain that come in
from elsewhere on an unauthenticated connection, but that prerequisite
is seldomly filled.

You might get some more insight on the upstream mailing list as this
is not a Debian issue.

Greetings
Marc

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