I've noticed the new version 5.0.11 no longer uses zimbra.log for postfix logging. It seems it puts most if not all of the postfix logs into messages.

I use pflogsumm.pl for getting reports from postfix to see how busy the server has been. It's a very nice perl utility.

What troubles me is I can't get reports anymore from messages log. zimbra.log file is totally empty.

Why was postfix logging changed? Is there another way to get reports of how busy server was?

Postfix Monitoring With Mailgraph And pflogsumm | HowtoForge - Linux Howtos and Tutorials

That's an idea of how pflogsumm works. I really need to see how our server is doing.