Today we give you about 5 minutes of Jesse Dougherty, where he talks about Exchange 2007 Security and Transport. You can get to the video here: - The Exchange Team Read More

This blog post is a troubleshooting tip to tackle messages sitting in the Messages awaiting directory lookup queue of your Exchange 2000 / 2003 server. Also known as the Pre-categorization queue, "Messages awaiting directory lookup" queue is the queue Read More

Hi All, I thought I would introduce myself to the BLOG-O-Sphere, my name is Scott Roberts and I'm a Software Developer in Test for the Exchange Sustained Engineering team. One of my responsibilities on the Exchange team includes being part of a team Read More

Summary In order to clean up Routing Engine’s Cache, we no longer have to recommend customers’ to shut down all their Exchange Servers simultaneously in the entire org.  This was required to force concurrent destruction of Org object that lives Read More

Exchange 2003 Server SP2 rounds out the anti-spam capabilities of Exchange Server 2003. With addition of Sender ID and IMF filters Exchange server is now capable of protecting an Exchange organization from many spam attack vectors. The flexible, Read More

You may already know that Exchange 2003 SP2 includes a new feature for SenderID support.  SenderID (http://www.microsoft.com/senderid) is the e-mail authentication framework that targets one of the most common security issues in the world of SMTP Read More

By this time, you all must be already aware of new anti-spam features provided in Exchange Server 2003 SP2. Alexander Nikolayev discusses all the anti-spam features of Exchange server 2003 SP2 in his article at: http://blogs.technet.com/exchange/archive/2005/07/18/407838.aspx Read More

"Spam is our e-mail customers' No. 1 complaint today, and Microsoft is innovating on many different fronts to eradicate it" - Bill Gates. With the release of Exchange 2003 Server SP2 Microsoft and the Exchange Server Product Unit are taking another Read More

What is Regtrace?   Regtrace is an extremely useful debug tool, which helps Exchange Escalation Engineers and Developers to diagnose and resolve an Exchange 2000 problem, usually transport related problems.  There are many scenarios where Read More

This time I have been asked to explain how Advanced Queuing behaves -- how retries work and when we decide to reroute mail.  Since I’ve had plenty of questions on this in the past, buckle your seatbelts – this one is going to be interesting.   Read More

We received lots of great feedback on my first blog post. With that, I think it is time to clear up the second largest area of confusion with Exchange SMTP transport: SMTP virtual servers. The short of it is, with the exception of the gateway server Read More

The vast majority of modern messaging environments have a challenge of establishing and maintaining reliable and secure Internet e-mail connectivity.  While the task of enabling Internet e-mail routing is relatively straight forward and usually well Read More

A common strategy for increasing the cost of would-be mail abuse uses a technique called tarpitting. Mail servers that tarpit wait a specified period of time before issuing SMTP responses to the client, thus increasing the time investment needed to successfully Read More

So for many weeks I've debated about what to post here.  My colleagues and I have worked pretty hard since the release of Exchange 2000 to document the SMTP Transport stack.  So I figured by now everyone knew everything there was to know about Read More

Getting a piece of email to a main-enabled public folder actually takes a bit more work than one might expect.   That is because public folders have some interesting characteristics that separate them from other mail-enabled objects in the directory: Read More