Formal and informal emails and letters useful links
Examples of several kinds of formal email and two informal emails
http://www.parapal-online.co.uk/resources/letters.html
Exercises on those emails
http://www.parapal-online.co.uk/letters.html
Short worksheet exercise on formal and informal letters
http://www.scribd.com/doc/3877648/Writing-Informal-and-Formal-Letters-1-Ev87
Formal and informal emails and letters (netiquette) answers to student question
http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv245.shtml
Short guide to formal letter layout, paragraphing etc
http://www.usingenglish.com/resources/letter-writing.html
Formal and informal letter phrases
http://esl.about.com/library/lessons/blwrite_informalletter.htm
Table of formal and informal letter phrases for different purposes (at least one spelling mistake!)
