Dear Yves,
Thanks for the help. Currently, I have ratelimited the incoming messages itself and it seem to be working fine. But I am interested to learn more. Could you please send me some sample config?
Regards,
Biju.
-----Original Message-----
From: Yves Goergen [
mailto:nospam.list@unclassified.de]
Sent: 03 November 2014 AM 04:12
To: Biju Abraham N.; exim-users@???
Subject: Re: [exim] Exim4 ratelimiting
On 31.10.2014 05:33 CE(S)T, Biju Abraham N. wrote:
> I am trying to ratelimit outgoing messages in my exim4 daemon. Many a
> times, our mail server has been hacked, multiple identity has been
> added and using those ids, hackers send out bulk spam mails. Once the
> limit is overcome, many domains are blacklisting us. As I understand
> from the manuals and searching the mailing lists, outgoing mails can
> not be ratelimited. Please correct me if I am wrong.
I'm in a similar situation. As soon as you host mailboxes for unexperienced users who cannot secure their computer or mobile devices, you regularly run into trouble with the entire server. It's just impossible to guarantee that all users keep their passwords safe.
But from what I've learned and implemented, rate-limiting outgoing messages is very well possible. I used the examples in the documentation and was able to set it up myself. The first time, our server nearly died under the sheer masses of messages sent through it. The second time, with rate limiting in effect, the consequences were a lot smaller. I even heard from one user that he was running into this limit once, so it really does have an effect.
If you need config examples, I can look it up.
--
Yves Goergen
http://unclassified.de
http://dev.unclassified.de
