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:[email protected]] 
Sent: 03 November 2014 AM 04:12
To: Biju Abraham N.; [email protected]
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




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