I tried to look up your Monitoring Account but I did not have enough information from your post. If you would like I could check the configuration of your monitoring and see if everything is correct, send me your name, IP or domain to support@mxtoolbox.com.
This depends on how you have the Monitoring configured for your account. We send alerts when we completely loose the SMTP connection to the IP Address/Server we are monitoring. It is likely that we didn't loose the SMTP connection when you had you incidents. After that the server is only pinged approximately once an hour to see if it is back up or responding. This could be the delay you are experiencing....
Please let us know if we can help with anything else.
Thank you,
Wendy
Wendy
MXToolBox Support
support@mxtoolbox.com