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SMTP  - 9.173 seconds - Not good! on Transaction Time

Posted on 2014-12-16
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I am running SBS 2008, using MXtool Box to reslove DNS issue its showing they were able to connect to your mail server on port 25, but the diagnostic session took longer than expected. This could indicate that your email server is under heavy load.
Here are the levels for which we issue warnings and alerts:

Over 5 Seconds: Warning
Over 8 Seconds: Alert
Having this warning on your lookup does not necessarily mean that you will have a problem receiving mail. It is simply a warning that things are less than optimal. This could end up causing users to experience delays with inbound mail.

It is also possible your server is “Tar pitting.” Tar pitting is a technique used by some email servers to slow down spammers. The idea is that legitimate senders will wait longer to establish a connection than spammers will


What can be done about this?
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Question by:AJ1978
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David Atkin earned 2000 total points
ID: 40504287
I wouldn't be too concerned about this. It can be caused by many reasons and doesn't necessarily mean there is an email issue.  For example it can also be caused by a slow router.

For example I've just done the MXtoolbox test against an office 365 connection and it came back with a transaction time of 8.248 seconds...

Unless you're having an actual issue with Exchange, IMO you can safely ignore it.
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