Recently we have noticed that Postini has been having some difficulties with a particular type of image spam. In the email headers there seems to be a forged X-Spamshield-Status-DATA header listing: Skipped, authenticated user
These messages also all seem to contain an unusual unsubscribe message at the bottom of the email. Instead of the typical Unsubscribe link it is an image:
Until anti-spam vendors get signatures in place to stop this spam, we are recommending that putting a content filter in place either on your anti-spam solution or on your mailbox to move messages with the “X-Spamshield-Status-DATA: Skipped, authenticated user” header to Junk.
We do not recommend clicking the image or trying to unsubscribe to these messages as you will just validate your email for spammers.
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