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Still waiting for a response from the ISP.
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Still waiting for a response from the ISP.

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We installed a firewall onsite.
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Our Internet provider’s servers recently went down. It has been back up for several days now. Before the service went down we had very little spam. Since it has come back up we are having excessive amounts of spam. One user has up to 500 a day. I contacted them and they said their firewall was back up and functioning, that something must have got into our Exchange Server. I have ran a scan on the server and found nothing. What could have got in to our server? I think it is on their end.<br />
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Thank you<br />

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Our Internet provider’s servers recently went down. It has been back up for several days now. Before the service went down we had very little spam. Since it has come back up we are having excessive amounts of spam. One user has up to 500 a day. I contacted them and they said their firewall was back up and functioning, that something must have got into our Exchange Server. I have ran a scan on the server and found nothing. What could have got in to our server? I think it is on their end.

Thank you


Excessive Spam

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.