+(defcustom epa-mail-aliases nil
+ "Alist of aliases of email addresses that stand for encryption keys.
+Each element is a list of email addresses (ALIAS EXPANSIONS...).
+When one of the recipients of a message being encrypted is ALIAS,
+instead of encrypting it for ALIAS, encrypt it for EXPANSIONS...
+
+If EXPANSIONS is empty, ignore ALIAS as regards encryption.
+This is a handy way to avoid warnings about addresses that you don't
+have any key for.
+
+The command `epa-mail-encrypt' uses this."
+ :type '(repeat (cons (string :tag "Alias") (repeat (string :tag "Expansion"))))
+ :group 'epa
+ :version "24.4")
+