Gnu-pop3d provides a change of gnu-pop3d with clients.Gnu forking pop3d dynamic volume as a Semaphore is not SSL. If you need to use SSL-Gnu pop3Sd (huge difference). I used GNU-pop3d, but he has a few failures. So I added some options for him. I added the-D option that converts username "MAILPATH" -> "U / S / username" or "a" -> "A / A / A". Server is for users (users not for the server), so I added the option to control the number of users connected and forks next process if we need it (IPCS man). Many people asked me about SSL implementation of SSL. To do this successfully and install Stunnel. So you POP3S implementation of the Protocol (works very well with all the gadgets from Microsoft).