Email Services for Ubuntu

Quoting one of e-books

Email Services for Ubuntu

The process of getting an email from one person to another over a network or the Internet involves many systems working together. Each of these systems must be correctly configured for the process to
work. The sender uses a Mail User Agent (MUA), or email client, to send the message through one or more Mail Transfer Agents (MTA), the last of which will hand it off to a Mail Delivery Agent (MDA)
for delivery to the recipient's mailbox, from which it will be retrieved by the recipient's email client, usually via a POP3 or IMAP server.


1. Postfix
2. Exim4
3. Dovecot Server
4. Mailman
5. Mail Filtering