Spamagator Anti-Spam
Download a copy today! Spamagator Anti-Spam Virtual Appliance No Per User Mailbox or User License Fees 98% + spam detection Thousands less than competitive systems Easy to install No dedicated hardware required (runs on VMware Player)
ShadowProtect
StorageCraft ShadowProtect Server Edition™, ShadowProtect Desktop Edition™ and ShadowProtect IT Edition™ are available through StorageCraft's network of authorised partners, resellers and integrators. 
Download a trial version of ShadowProtect Server Edition™, ShadowProtect Desktop Edition™ or ShadowProtect IT Edition™ from the StorageCraft Web site at: StorageCraft.com
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GFI FAXmaker
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GFI FAXmaker - The zero administration fax server! A professional fax server grants substantial savings on cost and improves customer service and image: The process of sending a fax is much shorter and incoming faxes are automatically integrated with today’s ‘email-based’ workflow. With over 100,000 fax servers shipped since its launch, and numerous industry awards, GFI FAXmaker is the leading enterprise quality fax server when it comes to reliability, ease of use and administration, and price. Why choose GFI FAXmaker for Exchange/SMTP as your fax server? Best fax integration available for your mail server Minimal administration and user training required The most popular fax server, voted #1 by Windows IT Pro readers 3 years running Unbeatable pricing up to unlimited users
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MailArchiva Enterprise
MailArchiva is a state-of-the-art email archiving system for companies of all sizes. It works in conjunction with popular mail systems to archive all incoming, outgoing and internal emails. Companies, educational institutions, NGO's and government agencies around the world rely on MailArchiva to archive millions of their emails for long term storage. Learn about MailArchiva Enterprise Edition. |
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Spammers May Use Exchange Against You! |
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Written by Bruce Naylor
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Wednesday, 06 February 2008 |
Spammers May Use Exchange Against You!Are you experiencing slow email deliveries? How about your Outbound Queues, are they full of NDR’s (non-delivery notices)? There is a new and sickening tactic that spammers are employing today. It’s called Reverse NDR spam, and it’s choking your Exchange Server. Currently, reports are coming in that nearly 30% of all spam is employing this technique. It works because it bypasses current filter technology. |
Here is how it works. The spammer forges the intended recipient in the From field of the e-mail, and a bogus recipient at the same domain in the To field. Once the e-mail is sent, the Exchange Server will send a NDR (Non Delivery Report) to the sender in the From field. When that person opens the e-mail the body of the spam is there for the victim to read. This extra activity creates more burden on a busy Exchange Server, and can fill the queues very quickly with these postmaster bogus NDR messages. So how do you cope with this scheme? To control NDR reports in Exchange, there are two check boxes in the recipient filtering within the Message Delivery section in Global Settings. You can also disable all NDR from your Exchange Server as well. Beware that some viruses may attempt the same behavior and you should maintain up to date protection for all servers/workstations. For more information on controlling NDR’s in Exchange: http://support.microsoft.com/default.aspx?scid=kb;en-us;294757 |
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