diff --git a/src/preferences/mail/ProviderInfo/gmx.de.rdef b/src/preferences/mail/ProviderInfo/gmx.de.rdef
index cbd2b6fef5..c8d1687313 100644
--- a/src/preferences/mail/ProviderInfo/gmx.de.rdef
+++ b/src/preferences/mail/ProviderInfo/gmx.de.rdef
@@ -2,7 +2,7 @@ resource(1, "POP Server") "pop.gmx.net";
 resource(2, "IMAP Server") "imap.gmx.net";
 resource(3, "SMTP Server") "mail.gmx.de";
 resource(4, "POP Authentication") 0;
-resource(5, "SMTP Authentication") 0;
+resource(5, "SMTP Authentication") 1;
 resource(6, "POP SSL") 0;
 resource(7, "IMAP SSL") 0;
 resource(8, "SMTP SSL") 0;