Our mailing system has near about 2 lacks users and currently we are on NT system. Now we are planning to move to solaris system. I am exploring options like courier , qmail, sendmail etc. After hunting on the net I came to know that many people are using qmail SMTP with courier IMAP server. And qmail SMTP is a most popular SMTP server to handle high load. Can anybody give me compariion of these qmail and courier SMTP servers? I have successfuly installed courier with MSSQL database but could not get qmail working with MSSQL database. That's why I am going for courier servers. Is there anybody having such userbase and using courier servers ( smtp, pop , IMAP ) ? Please Help. Thanx ---------------------------------------------------------------- Send and receive mail in Indian languages Register free at http://www.mailjol.com