Posts tagged as:

SMTP

Export and Import Content Filter Words or Phrases

September 15, 2009

In Exchange 2010 and Exchange 2007, you can add custom words or phrases as good or bad words to modify the Spam Confidence Level (SCL) assigned to messages. Messages with a good word or phrase are assigned an SCL of 0 and bypass other antispam agents that fire after the Content Filtering agent. Messages with [...]

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Are Distribution Groups really being used?

February 19, 2009

Over the years, you end up creating a large number of Distribution Groups based on user demands. The regular departmental Distribution Groups such as Sales, Marketing, Engineering, and HR. The geographical ones such as AllUS, All-California, All-BayArea, and so on. The ones by employment status such as All-FTE for full-time employees, All-Contractors, and so on. [...]

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EHLO: DSNConversionMode and You

December 11, 2008

If you haven’t already read Jason Nelson’s take on Delivery Service Notifications (DSNs), head over right away to DSNConversionMode and You: An Administrator’s Guide.

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Disable Antispam agents on a Receive Connector

September 29, 2008

Exchange 2007′s antispam agents are enabled for all Receive Connectors on a transport server. Is there a way to disable the agents on a particular Receive Connector? Although not as simple as turning an agent off for each IP address or Receive Connector, Exchange 2007′s new transport permissions model allows you to do this just [...]

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HOW TO: Prevent annoying spam from your own domain

September 3, 2008

One of the more annoying types of spam is the one that seems to be coming from your own domain; or worse— from your own email address! Of course, users from your own domain don’t generally spam each other— unless you’re using one of the free web-based email services. And most of us don’t spam [...]

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Delay Notifications: Informing users about delays in mail delivery

July 29, 2008

Users consider email to be a reliable communication mechanism – not as reliable as the dial tone, but pretty close. Most users expect mail to be delivered within minutes, if not seconds. Many organizations, including those operating in the financial & banking sectors, have strict SLAs for mail delivery which specify mail delivery times granularly— [...]

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Removing internal host names and IP addresses from message headers

May 20, 2008

Another frequently asked question about SMTP mail – how can I remove internal host names and IP addresses from outbound Internet mail? More often than not, this results from the belief that somehow if the outside world finds out an organization’s internal IP addresses and host names, it makes the organization vulnerable. Auditors love to [...]

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Routing outbound mail using a particular IP address

March 11, 2008

A question that frequently and inevitably pops up when discussing Exchange transport is that of being able to route outbound mail using a particular IP address. The Exchange Server 2003/2000 transport architecture was confusing for many newcomers— the difference between an SMTP Virtual Server and an SMTP Connector being the main cause of this confusion. [...]

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Exchange Server 2007 SP1: The most obscure (but relevant) changes

February 10, 2008

Recently I was asked by a fellow MCT (and now Exchange MVP) to list 3 most obscure (but relevant) changes in Exchange Server 2007 SP1. The first thing that came to mind was the change made to Back Pressure settings. Back Pressure stops inbound mailflow on transport servers if system resources fall below a certain [...]

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Exchange Server 2007: Renewing the self-signed certificate

January 28, 2008

Exchange Server 2007 issues itself a self-signed certificate for use with services like SMTP, IMAP, POP, IIS and UM. The certificate is issued for a period of one year. The self-signed certificate meets an important need – securing communication paths for Exchange services by default. Nevertheless, one should treat these certificates as temporary. Although the [...]

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