Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a server CentOS 5.3 and WHM/cPanel 11.24 installed. In exim log files I noticed these wordings next to most of the emails.

Warning: Sender rate (a number, like 2.4) / 1h

Do you have any idea what it means?

share|improve this question
up vote 3 down vote accepted

cPanel has a ratelimit option on the exim configuration. Basically it tells you for each ip its send rate. You can configure maximum send rate per ip per hour (after which that ip is temporarilty rejected, i.e. with code 4XX) to reduce the server load.

share|improve this answer
Is it possible to set ratelimit in exim.conf (I couldn't see that line) or cpanel only lets us to enable/disable this feature? – Ergec Jun 25 '10 at 12:28
@Ergec shure you can, take a look under "Advanced editor". I haven't access to a server at the moment to check where precisely is, but you should easily find it... – Mr Shunz Jun 27 '10 at 15:41
Can you please clarify exactly what the name of this option is. Like the O.P., I couldn't find an option that seemed to describe that behaviour. – Jeremy Visser Jun 16 '11 at 6:15
@Jeremy Visser Go under Exim Configuration Editor, scroll to bottom and click Advanced Editor. Then search for the line ratelimit = ... (Ctrl-F ratelimit should suffice). For the parameters you can put there you should check the exim documentation at . – Mr Shunz Jun 16 '11 at 11:25
And what does the 2.4 mean? Does that mean that IP address has attempted to send 2.4 times the limit? – Simon East Aug 7 '14 at 4:14

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.