Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
Sounds like an antivirus or antispam program is overwriting the incoming server to route the email through its program. Incoming should still work, but a bit slower.
If you do not want the antivirus program overwritting the setting, disable virus check of incoming mail. Do the same if antispam program is doing the overwriting.
Best wishes!