If a domain or identity is listed several times in the (expanded) value of
&%dkim_verify_signers%&, the ACL is only called once for that domain or identity.
+.new
+If multiple signatures match a domain (or identity), the ACL is called once
+for each matching signature.
+.wen
+
Inside the &%acl_smtp_dkim%&, the following expansion variables are
available (from most to least important):