Question Regarding MailServer Set Up

1) Start with the 512, probably. E-mail is not very resource-intensive, it's just an administrative pain.

2) You can enable TLS in your mail server, but there is no guarantee that other mail servers will speak TLS. Also, I don't know of any MDAs that support mail encryption when mail is stored.

3) Either should be fine. The web interface is a minor part of the whole thing. Choosing the MTA/MDA and IMAP servers are the key parts.

4) Sure.

5) Use Google Apps.

Thanks hoopycat

Google apps are fantastic but we really want to host our own emails. I am an extreme noob :D so a step by step guide is something I am looking for.

Thanks again.

One of the guides in the linode library would be a good place to start http://library.linode.com/email/postfix

you should buy ready to user SMTP server, I know a name sarvmail.com they provide you managed SMTP server based on mailing capacity. You just order and get smtp server. they managed your email delivery and configure server as you want. www.sarvmail.com/smtp

Thanks OBS

Which guide should be followed for Ubuntu 12.04 Long term release ?

Bleh just notice none of them are for 12.04. Pick one of the other Ubuntu ones then yell when you get to something that doesn't work.