First of all, thanks for great job of Zimbra, I have found too much before but Zimbra seems to be the one most people looking for. Not only the rich feature in the design, but also can integrated with oulook for operation.

Yup, actually I am finding a rich feature of webmail system, and in fact I have a backend system like postfix , clamav, spamassassin, amavisd-new and mysql. I know Zimbra has its own architecture and most of the software has already integrated in.

My question is, if, I would like to upgrade the postfix package from version 2.2.5 to 2.2.10, do we have a simply way or a install script (may be recompile a tar file ?? ) in order to compile it into Zimbra ?

And, if I edit manually, can the MTA work itself or it just depend on Zimbra how to read from ??

Thanks for help.