[horde] Mac OS X Server & Horde

[Horde]

Hello

I am currently investigating a move from Qmail on linux to Mac OS X 
Server on Snow Leopard (OSXS-SL) for my email and calendars, whilst at 
the same time keeping Horde. Has anyone gone through a conversion from 
Qmail to OSXS-SL or indeed is using OSXS-SL in combination with Horde 
for email and/or calenders?

Any pointers, pros/cons, comments very much appreciated.

TIA and regards
Kevin T.