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Pipe Character in Spam Address

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Pipe Character in Spam Address - 14.Apr.2009 5:34:45 AM   


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Joined: 14.Apr.2009
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We have a customer running Exchange 2003 on SBS.  They've started receiving a log of spam that is basically to their normal SMTP addresses but with a pipe character (|) at the start.

This means its bypassing their external spam filter as the address is not recognised (this is another issue).  However, Exchange seems to ignore the pipe and just deliver to the mailbox.  I've tried to use recipient filtering but this doesn't work as the pipe is still ignored.  The only way I've managed to filter the messages is to create a rule in OWA - if you create the same rule in Outlook it again ignores the pipe and resolves the address to the users account.

There are quite a few accounts so its not really practical to create rules in OWA for all of them - I'd really like to be able to filter at the server level.

Has anyone else ever seen this or have any suggestions?

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