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Tools and Tips for Testing Your Subject Lines
http://cdemails.com/articles/3128/1/Tools-and-Tips-for-Testing-Your-Subject-Lines-/Page1.html
Chinie Hidalgo Diaz
Chinie Hidalgo Diaz is a certified Email Marketing professional and a member of the eMarketing Association, the Email Experience Council, and the Email Marketers Club.   Aside from publishing the CD Email Solutions ezine, she also maintains the Philippine Emarketer's Journal.    
 
By Chinie Hidalgo Diaz
Published on 07/15/2008
 
Since the release of Alchemy Worx’ subject line study in June, there’s been a lot of buzz in the email industry about subject line length. I won’t go into the details of the different discussions, because at the end of it all… there’s no real answer as to how long or short your subject line should be! The only real answer is… to keep testing.