Recommendations for the Right IMAP Server?

eugene ts wong asks: "Our company is planning on taking care of its own email, by setting up our own server. I've been given the task of researching what is out there. So far, I've got my heart set on an IMAP server that we can install on Gentoo. Unfortunately, email isn't our forte, and I really have no idea of where to start. I've made some google searches, browsed around on the IMAP site, and also found this email. According to the mutt documentation, Cyrus and Courier are the best choices." What IMAP servers have you used, and which ones would you recommend?

"I'm still at a loss for what to do. The documentation of all but uw-imap seem to be a bit complex for me. If it helps, I'd like to point out that I have Mutt and nbsmtp installed, which work fine for connecting to our SMTP and POP servers. How do I know what will serve our needs the best? Also, is there an IMAP server that I could install easily for testing and learning purposes? I'd like to be able to get something installed without much configuration. Security shouldn't be an issue for testing purposes, because it will only be on the local network, and the computer will be turned off when I'm not actively testing it. We're also willing to purchase products as well. We're willing to hire a professional to do it for us, but the boss wanted some research done so that we know what we're getting. Any comments are welcome. Thanks in advance."

Comments

Avoid Apache

[Michael's a Jerk!]

I have a couple huge sites that run endless amounts of CGI all day long. I
constantly get:

[Sat Mar 6 17:08:47 1999] [error] [client 24.216.92.184] (11)Try again:
couldn't spawn child process: /apache133/web/site.com/perlprogram.cgi

every say 4 seconds, with the client getting the standard error 500 -
unrecoverable server error. I'm under Linux 2.0.35.

This use to bring my server to the ground, but I added more memory, and the
server is fine now, except for Apache. All CGI is run as "nobody". My top
command says:

5:21pm up 32 days, 2:41, 2 users, load average: 7.11, 5.36, 4.24
278 processes: 259 sleeping, 8 running, 11 zombie, 0 stopped
CPU states: 42.8% user, 23.8% system, 0.1% nice, 38.7% idle
Mem: 257168K av, 237796K used, 19372K free, 267660K shrd, 71272K buff
Swap: 120480K av, 0K used, 120480K free 47420K cached

My httpd.conf has

KeepAlive On
MaxKeepAliveRequests 1000
KeepAliveTimeout 30
MinSpareServers 5
MaxSpareServers 25
StartServers 5
MaxClients 500
MaxRequestsPerChild 3000

Is there anything at all I can do to allow more damn CGI to run? Whats with
the limit anyway? I just want to run an unlimited number of nobody
CGI processes. How can I do that?