I will be upgrading our general services server later today on Oct 21, around 05:00 UTC.
The Services Server handles things like email and DNS, so hopefully it will not overly impact anything while it is down, most things should be cached and/or just work after it is upgraded.
This will result in services being offline for a period of time while it's backed up, and then possible disruption for a while until the update is completed or undone.
I will also reply here and on the the Keyboard Maestro mastodon account when the process starts and finishes.
Refer to the System Status web page on my web server or here to determine the current status. If you detect an issue, that is a place you can report it.