Why emails were marked spam? courtesy of Google Blog

As a sender (via cron) of daily regression summary mails (to people who requested them, and who wonder when they don't see them anymore), I think I will find this very useful...  :-)

From: The Gmail Team

Date: Mon, Mar 19, 2012 at 7:14 PM
Subject: [Official Gmail Blog] Learn why a message ended up in your spam folder
To: gmail-blog-posts@googlegroups.com

Posted by Ela Czajka, Software Engineer

Many of our users say the accuracy of our spam filter is one of the key reasons they love Gmail. And while we think you should never have to look in your spam folder, we know some of you may want to know why the messages there were marked as spam.

So starting today, we'll be showing a brief explanation at the top of each of your spam messages. Simply look at any message in your spam folder and now you can find out why it was put there and learn about any potentially harmful content within the message.

We hope that this is not only interesting, but also helps you learn about scams and other harmful messages that Gmail filters out. Whether you prefer to leave your spam folder untouched or do some educational digging, the information will be there for you. And if you're interested in learning more, check out our new series of spam articles in the Gmail help center.

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Posted By The Gmail Team to Official Gmail Blog at 3/19/2012 06:14:00 PM