[Postfix] Increase default message size limit to 100 MiB

data/conf/postfix/main.cf

@@ -20,7 +20,7 @@ broken_sasl_auth_clients = yes
 disable_vrfy_command = yes
 maximal_backoff_time = 1800s
 maximal_queue_lifetime = 1d
-message_size_limit = 26214400
+message_size_limit = 104857600
 milter_default_action = accept
 milter_protocol = 6
 minimal_backoff_time = 300s