X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/8ad076b280659245702f943b00188589820aafeb..a843aaa6426eea0384891c3b7023511cc0525522:/doc/doc-docbook/spec.xfpt diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index 5e76fa801..fafb2f30a 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -1,4 +1,4 @@ -. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.24 2007/08/29 13:37:28 ph10 Exp $ +. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.25 2007/10/18 12:08:46 nm4 Exp $ . . ///////////////////////////////////////////////////////////////////////////// . This is the primary source of the Exim Manual. It is an xfpt document that is @@ -26974,12 +26974,21 @@ relies on the SIZE parameter on the MAIL command, which may be inaccurate or completely missing. You can follow the limit &'m'& in the configuration with K, M, or G to specify limits in kilobytes, megabytes, or gigabytes, respectively. +The &%per_rcpt%& option causes Exim to limit the rate at which +recipients are accepted. To be effective, it would need to be used in +either the &%acl_smtp_rcpt%& or the &%acl_not_smtp%& ACL. In the +&%acl_smtp_rcpt%& ACL, the number of recipients is incremented by one. +In the case of a locally submitted message in the &%acl_not_smtp%& ACL, +the number of recipients incremented is equal to &%$recipients_count%& +for the entire message. Note that in either case the rate limiting +engine will see a message with many recipients as a large high-speed +burst. + The &%per_cmd%& option causes Exim to recompute the rate every time the -condition is processed. This can be used to limit the SMTP command rate. The -alias &%per_rcpt%& is provided for use in the RCPT ACL instead of &%per_cmd%& -to make it clear that the effect is to limit the rate at which recipients are -accepted. Note that in this case the rate limiting engine will see a message -with many recipients as a large high-speed burst. +condition is processed. This can be used to limit the SMTP command rate. +This command is essentially an alias of &%per_rcpt%& to make it clear +that the effect is to limit the rate at which individual commands, +rather than recipients, are accepted. .section "Ratelimit options for handling fast clients" "ratophanfas" If a client's average rate is greater than the maximum, the rate limiting