We have gotten several responses from people who have recently migrated to the new version of MxWatch, our server monitoring service, and have been started getting Server Down alerts when there is no outage. These were immediately followed by Server Up alerts.
We have just updated the monitor in order to try to alleviate these false down messages. We considered a mail server offline if we are unable to open a connection on port 25 to your server within 15 seconds. The new patch requires the test to retry any connection that would cause a Down alert to get a second timeout before issuing the alert.
Your feedback is very appreciated. It was due to feedback that we were able to recognize this shortcoming and we hope this new patch fixes things.
MxToolBox Product Development Engineer