Re: [Exim] SMTP-Auth

On Thu, May 13, 2004 at 06:19:16PM +0200, Yves Goergen wrote:
> Is that possible at all? I mean, a mail server should be able to receive
> mail for local users in any case.

I think he means that he doesn't want unauthenticated access.

> Imaging an external mail server, say
> from hotmail.com. If another user (assume no spammer...) wants to send
> you a mail, it will be resent (relayed) by hotmail which in turn will
> send it to the MX of your domain. But hotmail won't have AUTH data for
> your mail server, so this must work unauthenticated. You get the point?

With Exim 4 it is trivial to have different settings for different
interfaces or remote addresses. I already have our main gateway box
presenting different authentication certificates depending on whether
you are connectiong from the Internet or our internal LAN. Soon I will
be changing it so that all internal smtp connections require
authentication: combined with our firewall rules, that will effectively
guarantuee that, should an e-mail virus ever infect one of our Windows
worstations, it won't be able to send mail out.

--
Bruce

Those who cast the votes decide nothing. Those who count the
votes decide everything. -- Joseph Stalin