Support /defer_ok on verify=reverse_host_lookup. Bug 344

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

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index d5a16cacc2eebf93d37f92d4dad8656516b2c86f..77d966d6df2cd82aed58bb65361d73eee1506c12 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -28824,7 +28824,7 @@ verified is redirected to a single address, verification continues with the new
 address, and in that case, the subsequent value of &$address_data$& is the
 value for the child address.
 
-.vitem &*verify&~=&~reverse_host_lookup*&
+.vitem &*verify&~=&~reverse_host_lookup/*&<&'options'&>
 .cindex "&%verify%& ACL condition"
 .cindex "&ACL;" "verifying host reverse lookup"
 .cindex "host" "verifying reverse lookup"
@@ -28835,6 +28835,9 @@ Verification ensures that the host name obtained from a reverse DNS lookup, or
 one of its aliases, does, when it is itself looked up in the DNS, yield the
 original IP address.
 
+There is one possible option, &`defer_ok`&.  If this is present and a
+DNS operation returns a temporary error, the verify condition succeeds.
+
 If this condition is used for a locally generated message (that is, when there
 is no client host involved), it always succeeds.