I had WG 5.0.10 running fine when I learned that 5.2 and somewhat later 5.2.2 were released. My setup does not include a pop or smtp server. All mail should go directly to the external smtp servers.
First I installed 5.2 and noticed that smtp was delaying mail delivery. Then that 5.2.2 does not deliver mail at all. Mail would be sitting in the outbox, apparently with no way to go. So I went back to 5.0.10 and, presto, all mail found their way.
The only configuration I did was setting the scope for the dhcp server and securing the system policy for internal users.
I am using adsl, non-ras, with an AZTECH adsl modem, win2k server and winxp clients.