Hi Fernando, I use uw-imapd-ssl and popa3d, I've used popa3d in the ISP world support over 1000 users without seeing any problems, as for uw-imapd I use at my current workplace with about 15 users all with over 100Mb of mail some users have upto 1Gb of mail and everything works great. Tho remember that if you use the SSL version its a lot more intensive on the server. - Regards - Organ Grinder