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  • Writer's pictureArial Software Technical

Microsoft Exchange Server Sending Speed

Updated: Feb 3

Many email professionals use Microsoft's Exchange server to send out their emails from Campaign Enterprise or Email Marketing director. The number one complaint we get is usually that it is very slow even though they are on "a super fast system on a fast internet connection." By default, Exchange Server is not setup to be a mass email system. In fact, they have created many settings by default to stop email from being accepted at a rapid pace. Depending on your Exchange Server version, there are settings you can look at to stop this throttling. A prominent term used is "tarpitting." Now the subject of tarpitting mainly concerns a set of parameters you can set in your Exchange Server so that it will accept emails at a rapid pace. Because of all the version of Exchange Server out there, and with them trying to deal with the SPAM issue through time, there are different settings for each of these versions which we cannot cover, but hopefully this article will uncover a nagging problem you might be having. Now keep in mind, many Exchange Server administrators may not even know what you are talking about because it is a rare occurrence and they probably have not encounter it before, so you may have to prime the pump with some Google service on "Exchange Server SMTP slowness" and show them some of the settings they will have to deal with.

If you have any questions on this subject please email us at

Campaign Enterprise is a scaleable enterprise-level email distribution system that runs on your own in-house computers connecting directly to your database or CRM in real-time, and using your own mail server. Visit for more information.


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