diff --git a/modoboa_installer/scripts/files/dovecot/conf.d/10-auth.conf b/modoboa_installer/scripts/files/dovecot/conf.d/10-auth.conf
index ce2d259..0db3552 100644
--- a/modoboa_installer/scripts/files/dovecot/conf.d/10-auth.conf
+++ b/modoboa_installer/scripts/files/dovecot/conf.d/10-auth.conf
@@ -96,7 +96,7 @@ auth_master_user_separator = *
 #   plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey
 #   gss-spnego
 # NOTE: See also disable_plaintext_auth setting.
-auth_mechanisms = plain
+auth_mechanisms = plain login cram-md5
 
 ##
 ## Password and user databases