I had installed the Exchange 2000 SP3 a view days ago and after installing the Windows 2000 SP3 my server suddenly began to relay!!!! Only after uninstalling the W2K SP3 it worked again. It wad the middle of the night so I didnt try to reinstall the Ex2K Sp3.
UPDATE: EX2K SP3 does NOT fix the problem!!! I am now running with UNINSTALLED W2K SP3.
Any similar experiences?