Add dnsdb lookup pseudo-type "a+". Addresses bug 1269.

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

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 99de2870b912a16554bd2b282a036077bae18871..f902fe856b5d1c12a639a38a3c5b99e2ee1fb2d1 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -6911,6 +6911,14 @@ has two space-separated fields: an authorization code and a target host name.
 The authorization code can be &"Y"& for yes, &"N"& for no, &"X"& for explicit
 authorization required but absent, or &"?"& for unknown.
 
+.cindex "A+" "in &(dnsdb)& lookup"
+The pseudo-type A+ performs an A6 lookup (if configured) followed by an AAAA
+and then an A lookup.  All results are returned; defer processing
+(see below) is handled separately for each lookup.  Example:
+.code
+${lookup dnsdb {>; a+=$sender_helo_name}}
+.endd
+
 
 .section "Multiple dnsdb lookups" "SECID67"
 In the previous sections, &(dnsdb)& lookups for a single domain are described.