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Know the Lingo - Email Anatomy from Head to Footer
http://cdemails.com/articles/3205/1/Know-the-Lingo---Email-Anatomy-from-Head-to-Footer/Page1.html
EEC Blog
The Email Experience Council's blog is a forum for the email marketing industry's leading voices.  
By EEC Blog
Published on 07/26/2008
 
Diving headlong into the world of email creative is tough if you don’t have all the lingo down. Here’s a handy cheat sheet for those who are still polishing their grasp on the glossaries, and a brush up on definitions and best practices for those who already know their stuff.