[CentOS] Mail server setup for small ISP

[Matt]

> It's been awhile since I looked into it, but I recommend outsourcing your
> email.
>
> Companies like fusemail (http://www.fusemail.com/solutions/resellers.html )
> will give you accounts at $0.69/month/account for a 1GB account (last time I
> checked anyway). They provide an API and a dashboard for managing it. They
> also handle backups, I believe (read the fine print before you trust me). I
> think there is spam filtering and anti-virus built in too.

Kept thinking that as well.  Only issue is that 0.69 x 2000 equals a
pretty good chunk of change for us.  One thing I would reccommend
though is putting it in a colocation facillity rather then local.
Also start with a beefy machine because its a real pain to upgrade
later.

Matt