Add keymap_only configuration, to ignore public_keys list.

This means the keymap will be exclusively used to determine which email addresses to sign with which keys.

gpg-mailgate.conf.sample

@@ -3,6 +3,11 @@
 # this may be useful for debugging purposes
 add_header = yes
 
+# whether we should only sign emails if they are explicitly defined in
+#  the key mappings below ([keymap] section)
+# this means gpg-mailgate won't automatically detect PGP recipients
+keymap_only = no
+
 [gpg]
 # the directory where gpg-mailgate public keys are stored
 # (see INSTALL for details)

gpg-mailgate.py

@@ -95,7 +95,7 @@ gpg_to = list()
 ungpg_to = list()
 
 for to in to_addrs:
-	if to in keys:
+	if to in keys and not ( cfg['default'].has_key('keymap_only') and cfg['default']['keymap_only'] == 'yes'  ):
 		gpg_to.append( (to, to) )
 	elif cfg.has_key('keymap') and cfg['keymap'].has_key(to):
 		gpg_to.append( (to, cfg['keymap'][to]) )