I have multiple emails for most online accounts. None of them are generating unwanted emails. There are two accounts that I have had for a long time prior to this newer practice and these are constantly receiving unwanted spam. I was able to correlate this to a project I worked on 15 years ago when one of the other contractors on the project gave me a thumb drive to install software related to the project. It blue screened my laptop - but it was too late - my laptop was hacked. Ever since then those emails have been out in the wild. I learned my lesson about good thumb drive hygiene after that.