I was wondering if not better use hMail Server instead of the Mercury Mail for the Windows XAMPP.
I've tryied Mercury 1 year ago and I've found it quite unfriendly.
hMail seems more simple to use, has a user friendly GUI, is safe, VERY fast, it also has web interface for both management and web clients, and Clam Antivirus at one clik distance.
I've even manage to make hMail use the MySQL from the XAMPP installation instead of its built-in mysql server.
If you have some similar experinces, share it with us.