Depending on your requirements either iRedMail (for an out of the box support of virtual domains, etc) or otherwise... just plain simple postfix. Howto Forge h

Depending on your requirements either iRedMail (for an out of the box support of virtual domains, etc) or otherwise... just plain simple postfix. Howto Forge has some good tutorials (http://www.howtoforge.com/howtos/email http://www.howtoforge.com/howtos/email). Its all a question of why you are doing it. If your aiming to learn, then I would recommend using a howto and installing different components. If your running a business... seriously look at just using Google Apps or some other similar system. If you need sending capability then SendGrid and such are suitable for low volume (sub multi-million messages / month). The biggest problem you are going to face in running your own server is keeping the design up to date.... every year Spam detection methods change, and you need to keep on top of that. Thats what eventually made me pack it in and move my hosting to google. I'm a RHCE and administer and support mail server for a some quite large national brands. But I can't be bothered for my own domain. If your are or are looking to be a systems guy then LEARN EMAIL (SMTP, POP, IMAP), its one of the core competencies. If your a dev you should know it, but outsourcing the running of it can make sense. Just don't be a fool and outsource it if its the core of your business. If your sending (or recieving) above a certain threshold its almost always cheaper to do it yourself.