From field in Sent Mail shows - my vacuum cleaner
When I send an email in Apple Mail using my Yahoo account, and select From: my Yahoo account, my Sent folder shows that the mail was sent from "Roomba." Roomba is a Contact I once created for a vacuum cleaner company.
This only happens on my Mac Pro - test messages composed on my iPhone and Macbook show me - not Roomba.
Mail Preferences/Composing/Addressing offers a "Send new messages from" options list. Whether I choose "automatically select best account" or the email address itself - Mac Pro Mail still says the sent message came from Roomba.
I went into the Roomba contact and deleted the Yahoo account from the Email field.
And Sent mail still says from Roomba.
At no time in the past was I demented enough to deliberately compose an email from my vacuum cleaner.
Fortunately recipients see it's from me, not my vacuum cleaner - but it's weird and annoying to have my Sent folder haunted by a robot. A Dark Mirror episode?
Any ideas? Thanks!
2013 Mac Pro (trash can), OSX Mojave