Weird busy mode emails while offline

Started yesterday.
While at work I checked my home email and had a single message from second life
The Resident you messaged is in 'busy mode' which means they have requested not to be disturbed. Your message will still be shown in their IM panel for later viewing.
I was not online and had not replied to any game emails.

Even though nobody has my password but figured, be safe. I changed it.

Now today I have had 3 more of the same when I was not in game and hadn't replied to any IM messages/emails.

Is anybody else experiencing the same?

I did a quick search but see nothing like it posted.

The most likely possibility is that you have a scripted object sitting around inworld that is IMing a busy resident. Vendors are often a prime example, as are some vehicles.