Exim 4.60 and ratelimit

[fmalekpour]

Hello,
Is any one know how to upgrade the exim to latest version 4.60? It comes with new "ratelimit" feature, useful to control mail bombers and massive mail senders.

The ratelimit ACL condition can be used to measure and control the rate at which clients can send email. This is more powerful than the smtp_ratelimit_* options, because those options control the rate of commands in a single SMTP session only, whereas the ratelimit condition works across all connections (concurrent and sequential) from the same client host.

Thanks
F.Malekpour

[chirpy]

cPanel don't offer that version as yet, so you can't unless you can find a source rpm on cPanel's site and try and compile it yourself.

In the meantime you could always look at using the smtp_accept_max_per_host command and use a dictionary attack ACL:
http://www.configserver.com/free/eximdeny.html

[bmuthig]

We have a customer who is sending (legitimate) large batches of email that is killing exim and then the dedicated server... I'm having trouble finding good documentation on how to have exim just queue up messages so the server doesn't die and send them out only a few at a time. Basically what happens is it ends up spawning a ton of exim processes (like 200+) at once... does anybody have an real world examples of how to stop this behavior? Maybe I'm misunderstanding the exim behavior of spawning all the processes. Any help is appreciated.

I have seen a couple options:

queue_run_max = 10
remote_max_parallel = 10


But these don't seem to have affect the 200+ exim procs getting spawned when a batch is sent. Thanks!

[fleksi]

cPanel don't offer that version as yet, so you can't unless you can find a source rpm on cPanel's site and try and compile it yourself.

I found there is a new version on http://httpupdate.cpanel.net/exim-cp...d5pass.src.rpm
Is it safe to compile this rpm?
I am using 10.8.1-RELEASE_113 + RHEL3.

Thank you,
-fl-

[chirpy]

Entirely up to you, but it's not an offocial release, so you probably wouldn't get support for it until it is:
http://diff.cpanel.net/eximinstall/version

[chirpy]

I have seen a couple options:

queue_run_max = 10
remote_max_parallel = 10

To queue on high load average, try:

queue_only_load = 5

All emails should then be dumped to the queue if your load average is 5 or higher at the time of the relay.

[fleksi]

Any update for /scripts/eximup ?

[chirpy]

Visit the URL I already posted.

[bmuthig]

http://diff.cpanel.net/eximinstall/version

Just as an FYI for anybody subscribed to this thread still. Anybody tried implementing some ratelimit rules yet? Successes? Failures?

[DomineauX]

Found this interesting thread on using the new ACL section added to default Exim config:

----------------------------------
acl_connect:
[% ACL_CONNECT_BLOCK %]

# do not change the comment in the line below, it is required for /usr/local/cpanel/bin/check_exim_config
#acl_smtp_notquit is required for this to work (exim 4.68)

acl_notquit:
[% ACL_NOTQUIT_BLOCK %]

----------------------------------



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