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?


cPanel has a ratelimit option on the exim configuration.

Basically it tells you for each IP address its send rate.

You can configure a maximum send rate per IP per hour (after which that IP is temporarily rejected, i.e. with code 4XX) to reduce the server load.

  • 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
  • 2
    @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 exim.org/docs.html . – 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

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