doc,email-validator: document the new NULLMX handling

[email-validator.git] / doc / man1 / email-validator.1

diff --git a/doc/man1/email-validator.1 b/doc/man1/email-validator.1
index 1e0e144940db48e78f3b7ddc5428457c81d7b86b..605b57010256b19858024cf973232358b757a6f3 100644 (file)
--- a/doc/man1/email-validator.1
+++ b/doc/man1/email-validator.1
@@ -33,10 +33,12 @@ grammar (see the \fB\-\-rfc5322\fR option).
 
 .IP \[bu]
 Confirmation of the existence of an \fIMX\fR record for the domain
-part of the address. This is not required; in fact many domains accept
-mail via an \fIA\fR record for e.g. example.com which is used in lieu
-of an \fIMX\fR record. This behavior can be controlled via the
-\fR\-\-accept\-a\fR flag.
+part of the address. NULLMX (RFC7505) records are not accepted. This
+is not required; in fact many domains accept mail via an \fIA\fR
+record for (say) example.com which is used in lieu of an \fIMX\fR
+record. This behavior can be controlled via the \fR\-\-accept\-a\fR
+flag, but note that \fR\-\-accept\-a\fR is ignored for domains that
+have NULLMX records.
 
 .P
 These checks are performed in parallel using the number of available