I'm migrating a bunch of sites from a terrible oversold vps service with cpanel and all that jazz to an unmanaged vps that will be run almost completely through the command line. I have pretty much everything under control but email, and am hoping I can get a little insight into how I can get something reliable working for a lot of different domains. I don't need a fancy webmail client or anything like that, just something that can forward email to my regular account and send emails that won't end up in a spam folder. Spam detection is important too, I guess, since gmail likes to block IPs that forward too many emails that end up in your spam folder. The script I'm using to bootstrap most of the setup stuff is exim, so if possible I'd rather stick with it. Any inight, suggestions, warnings, etc?