How do I test the stability of my connection to the mail server?

To check your connection to the mail server, please run a PathPing test when the error occurs using the command:

pathping /n mailserver

Allow sufficient time for the test to complete, as outlined at https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/pathping. Additionally, you can verify your email functionality by accessing https://webmail.supremecluster.com using your full email address and password.