The RFC for this topic says 998 total characters, max of 78 per line. I
don't believe all email clients support multiline subjects, so 78 characters
is the practical limit to support the widest number of mail clients.
--
Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
Coauthor, OneNote 2003 for Windows (Visual QuickStart Guide)
Author, Google and Other Search Engines (Visual QuickStart Guide)
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