That depends on who you ask! For the corporate desktop user, Exchange is
1st with Notes 2nd (Groupware users). What thay don't know is the server
is inside their firewall, while a sendmail server sits in the DMZ (open to
the internet). This sendmail server may feed many Exchange servers on a
Wide Area Network and relays the outgoing as well.
Exchange is a corporate groupware server, not a internet mail server. The
last exchange server I worked on was 5.5. The flat file filled the
partition (> 18 GB) and had to be rebuilt. This utility took almost a week
(unhappy Windowz users).
While I mostly like Qpopper as a POP3 APOP server, the temp files on large
mailboxes can be a problem, and APOP is not PAM aware (password sync).
Microsoft Hotmail uses Qmail on UNIX!! http://www.qmail.org/top.html
With 500 connections open, it rocks!! On a Dual PIII 866MHz with 512 MB
RAM, SCSI, and RedHat 6.2, it was relaying > 150,000 messages per hour.
Qmail supports maildir (http://www.qmail.org/top.html#maildir) and
courier-imap (POP3 and IMAP4 with-or-without SSL) is faster (and secure).
The downside with Qmail is the install. It requires serious system
reconfiguration, and you may need to patch the source code and rebuild.
If the Groupware features are not needed, Sendmail and Qpopper is a better
I don't hate Microsoft, I just love everything else better!
> I was just wandering how MS Exchange compares to a
> Linux(Sendmail/Qpoper) based server? I was just told by someone that
> over 90% + of email servers are based on Exchange and so on. Made me
> feel like our Cobalt Raq 4 based on Sendmail and such was a piece of
> junk. We are pretty happy with it and it runs Mailscanner and
> Spamassassin as an added bonus.
> Don't want to start a flame war but could someone point me at info or
> links comparing the two different approaches?