Steve Baur writes:
Yes. Always use the movemail installed with your SXEmacs. Failure to do so can result in lost mail.
Please refer to Jamie Zawinski’s notes at http://home.netscape.com/eng/mozilla/2.0/relnotes/demo/movemail.html. In particular, this document will show you how to make Netscape use the version of movemail configured for your system by the person who built SXEmacs.