Okay of all times for this to happen when I'm on the road picking up two absolutely fabulous vintage automatic washers (more to come on that later).
I just changed the password to the webmaster email account, it seems it only affected that one account and it's the only one that I also have tied to yahoo mail for reading, which I suspect may have been the bad link in all this. It only seemed to have sent emails for anyone that sent me an email and I replied to back from May of 2019 to now when the email account was flushed and set up new. There actually aren't that many that emails got sent out from that date on and many got returned deliverable. I hope that this will stop it by changing the password. My apologies everyone, first time in nearly 20 years I've ever had any kind of hacking like this.
Please Keep me posted if you keep getting these spam emails. They are not in my sent folder so they have to be coming from a different server. The automaticwasher server seems untouched by all this (thankfully) so I'm guessing it came from something on my local laptop or yahoo mail.