Docs: clarify use of $dkim_selector variable

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index cd06de8d980256ec8411f9b1cb5cd1b4f527ce42..18d67fe208458ee87a09ad693f8076fedece0bb0 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -38020,7 +38020,7 @@ option is put into the &%$dkim_domain%& expansion variable.
 MANDATORY:
 This sets the key selector string. You can use the &%$dkim_domain%& expansion
 variable to look up a matching selector. The result is put in the expansion
-variable &%$dkim_selector%& which should be used in the &%dkim_private_key%&
+variable &%$dkim_selector%& which may be used in the &%dkim_private_key%&
 option along with &%$dkim_domain%&.
 
 .option dkim_private_key smtp string&!! unset