Messages in your spam folder now tell you why the messages were put there, and you can learn about any potentially harmful content within them.

Release track:
Rapid & Scheduled

Editions included:
Google Apps, Google Apps for Business, Government and Education

Languages included:
All languages supported by Gmail

For more information:
http://gmailblog.blogspot.com/2012/03/learn-why-message-ended-up-in-your-spam.html
http://support.google.com/mail/bin/answer.py?hl=en&answer=1366858

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