On Oct/31 08:12AM, Duane Hill wrote: > > On Thursday, October 30, 2014, 11:33:43 PM, Biju wrote: > > > Hi All, > > > > 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. > > > > What I am thinking is to rate limit using IP tables number of messages going > > out domain wise to some limit. I can only reject connections using IP > > tables. What I need is to defer the rejected connections. Where in the exim4 > > do I do this? Is it in routers? > > > > I am sure many of you may have faced such issues. Please help with > > appropriate pointers. > > Doing a quick Google search (search terms: 'exim rate limit') turns up > a post to github from Lena on 'Blocking compromised accounts > (outgoing spam) and auth cracking'. > > https://github.com/Exim/exim/wiki/BlockCracking > > Perhaps you can use this or tailor it to your needs in accomplishing > your task.
I'm no expert, but wouldn't the appropriate response be to learn to secure the server, rather than hacking on exim to solve this problem? Thanks in advance. -- Joshua
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