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Added warning that lab 3 must be complete before starting this lab.
==OVERVIEW & PREPARATION==
{{Admon/important|Warning|Your lab 3 must be complete with a functioning DNS server for your domain before this lab will work.}}
You may not be aware of it as an user, but email is a very <u>complex</u> system to administer. In fact, the more modern e-mail systems (eg. web-based mail applications, etc) are more technically involved than the other archaic, hard-to-configure, and sometimes inter-operable mail systems.
* [https://support.google.com/mail/answer/29436?hl=en Reading Full Email Headers] (Explanation of message header information)
* [http://wiki.dovecot.org/MailServerOverview Here's an overview] (common mail server terms)
==INVESTIGATION 1: INSTALL, SET-UP, AND USE THE MAIL USER AGENT ('''MUA''')==
