diff --git a/priv/sys.config b/priv/sys.config
index bc9bd07..9c0784d 100644
--- a/priv/sys.config
+++ b/priv/sys.config
@@ -1,85 +1,89 @@
 %% Example configuration for Guam.
 [
     {
         kolab_guam, [
             {
                 imap_servers, [
                     {
                         imap, [
                             { host, "127.0.0.1" },
                             { port, 143 },
                             { tls, starttls }
                         ]
                     },
                     {
                         imaps, [
                             { host, "127.0.0.1" },
                             { port, 993 },
                             { tls, true }
                         ]
                     }
                 ]
             },
             {
                 listeners, [
                     {
                         imap, [
                             { port, 9143 },
                             { imap_server, imap },
                             {
                                 rules, [
                                     { filter_groupware, [] }
                                 ]
                             },
                             {
                                 tls_config, [
-                                    { certfile, "/etc/pki/tls/private/localhost.pem" }
+                                    { certfile, "/etc/pki/tls/private/localhost.pem" },
+                                    { cacertfile, "/etc/pki/tls/private/localhost.ca.pem" },
+                                    { keyfile, "/etc/pki/tls/private/localhost.key" }
                                 ]
                             }
                         ]
                     },
                     {
                         imaps, [
                             { port, 9993 },
                             { implicit_tls, true },
                             { imap_server, imaps },
                             {
                                 rules, [
                                     { filter_groupware, [] }
                                 ]
                             },
                             {
                                 tls_config, [
-                                    { certfile, "/etc/pki/tls/private/localhost.pem" }
+                                    { certfile, "/etc/pki/tls/private/localhost.pem" },
+                                    { cacertfile, "/etc/pki/tls/private/localhost.ca.pem" },
+                                    { keyfile, "/etc/pki/tls/private/localhost.key" }
                                 ]
                             }
                         ]
                     }
                 ]
             }
         ]
     },
 
     {
         lager, [
             {
                 handlers, [
                     { lager_console_backend, debug },
                     { lager_file_backend, [ { file, "log/error.log"}, { level, error } ] },
                     { lager_file_backend, [ { file, "log/console.log"}, { level, info } ] }
                 ]
             }
         ]
     },
 
     %% SASL config
     {
         sasl, [
             { sasl_error_logger, { file, "log/sasl-error.log" } },
             { errlog_type, error },
             { error_logger_mf_dir, "log/sasl" },      % Log directory
             { error_logger_mf_maxbytes, 10485760 },   % 10 MB max file size
             { error_logger_mf_maxfiles, 5 }           % 5 files max
         ]
     }
 ].