Good mail server software to use with MHonArc?

Hello All,

 

I am currently running MHonArc on an old Windows Server 2003 x32 box,
with IMail 8 as the mail server front end.

 

As 2003 is rapidly nearing End-of-Life, I plan to upgrade our current
MHonArc server to a new box with Windows Server 2012 R2 and a new mail
server.  What's a good Windows x64 mail server that is compatible with
MHonArc?  Any suggestions would be greatly appreciated!

 

Thanks,

 

-Dave