perlpop v0.9b
Copyright 2004 Jeremy Kister
http://jeremy.kister.net/code/perl/perlpop/

perlpop is a perl POP3 server that is compatible with djb's
checkpassword username/password checking mechanism with the
following features:

RFC 1939 compliance
UIDL support 
TOP support 
APOP hook
modular password checking

perlpop may be copied and distributed under the terms found in the
Perl "Artistic License".  A copy of this license may be found in the
standard Perl distribution, or in the file "Artistic".

please report all bugs to: perlpop-devel @t jeremykister.com.

perlpop must be started as root in order to set up the listening
socket on port 110, but immediately drops special priveleges and runs
as a less priveleged user.  It will accept up to 20 concurrent
connections, and will only let any particular IP address make 3
concurrent connections.  Each connection has a 30 second idle timeout.

You may choose perlpop over various other pop3 implementations,
because it was programmed entirely in perl, making it easy to modify,
while still serving connections very fast.  Once the daemon is loaded
into memory, it's speeds rival many top competitors.  In addition,
the daemon takes a total of about 5MB memory.