At http://www.craigjconsulting.com/bmgrptch.html#nbm37 it says you can have
multiple mail domains on BM3.7 using the proxy.cfg at
http://www.craigjconsulting.com/proxycfg.html but the proxy.cfg says this
feature is only for BM3.8.

Which is correct please? If it's the first I'm guessing this is part of
BM37FP4A which I haven't yet applied.

Thanks