Electronic junk mail!
It is useful for companies like property managers for instance to send notifications to tenants, owners, vendors, etc. from within their management software. Many types of businesses can use this to communicate with their established contacts. Recipients must opt in.
Nailed it!
Actually it’s worse than that. They make tools so you can generate junk mail even faster.
Sounds pretty much like it or an Indian guy pretending to be “Bob” in coustomers relations.