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unicoded emails with .gif attachments

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vrspock View Drop Down
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    Posted: 26 January 2006 at 10:23am

We have been battling a thunderstorm of spam email hitting us since around Friday....we became aware of it when we got flooded with NDR bounce back notices for a whole flurry of emails hitting invalid mailboxes on our mail server and they all had this in common.

The body is 100% unicode.  The subject appears to be also since we can't block them with the keyword filter at all.

As a last resort, we have banned .gif file attachments.  We feel that most people use .jpg for picture attachments these days anyhow and do not believe this will create a significant number of false positives compare against what it will block.

Anyone else seeing this stuff?  If so, got any suggestions on how to tackle it?

Thanks.

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Desperado View Drop Down
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Joined: 27 January 2005
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Desperado Quote  Post ReplyReply Direct Link To This Post Posted: 26 January 2006 at 10:33am
Can you find the *source* of one message subject and post it?  Not the subject after the mail client renders it but the raw subject header.  I may have a workable filter (or not)
The Desperado
Dan Seligmann.
Work: http://www.mags.net
Personal: http://www.desperado.com

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