Clarify meaning of "all headers" when rewriting.

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 5e76fa8018c2351625694cab4111edc5f531eedb..dc441df2f38bf6e3c7c5f65ef973aee1b150a7f6 100644 (file)
--- 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 1.26 2007/10/24 17:47:31 fanf2 Exp $
 .
 . /////////////////////////////////////////////////////////////////////////////
 . This is the primary source of the Exim Manual. It is an xfpt document that is
@@ -22342,6 +22342,10 @@ rewriting rule is skipped unless the relevant addresses are being processed.
 &`s`&       rewrite the &'Sender:'& header
 &`t`&       rewrite the &'To:'& header
 .endd
+"All headers" means all of the headers listed above that can be selected
+individually, plus their &'Resent-'& versions. It does not include
+other headers such as &'Subject:'& etc.
+
 You should be particularly careful about rewriting &'Sender:'& headers, and
 restrict this to special known cases in your own domains.
 
@@ -26974,12 +26978,21 @@ 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