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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?

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up vote 2 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.

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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
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@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
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