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Non-account blocking was not on. &nbsp;This has always been set on our account and we never had issues with spam with our 2003 server. &nbsp;When I turned it on we stopped receiving spam.
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Non-account blocking was not on.  This has always been set on our account and we never had issues with spam with our 2003 server.  When I turned it on we stopped receiving spam.

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This weekend I moved our organizations mailboxes from our old 2003 Exchange over to a 2010 Exchange server and now we are receiving a large amount of SPAM even though mail is being processed by Postini. &nbsp;I have our firewall and the receive connector only accepting connections from the Postini address range. &nbsp;I can't think of how SPAM would be making it in.<br />
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What else should I look into? &nbsp;Is there something obvious that I missed?
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This weekend I moved our organizations mailboxes from our old 2003 Exchange over to a 2010 Exchange server and now we are receiving a large amount of SPAM even though mail is being processed by Postini.  I have our firewall and the receive connector only accepting connections from the Postini address range.  I can't think of how SPAM would be making it in.

What else should I look into?  Is there something obvious that I missed?

Moved from Exchange 2003 to 2010, now getting SPAM through Postini

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.