[syslog-ng]Eliminating certain keyword from the "all" directive?

Hi all, I have a question regarding the redirection of certain log messages to files. I currently have the "all" directive sending every syslog message into /var/log/messages, via: destination all { file("/var/log/messages"); }; And that is great, except I don't want my mail messages getting sent into the messages file as well as this takes up a lot of space. So I basically need some way to say "send all messages except for mail messages into /var/log/messages" Is there such a way? Thank you for any help!!