Mac, iPhone, iPad and iPod Help & Troubleshooting
I have a pal who has a recent Mac laptop that he -sigh- updated to Big Sur.
His Yahoo! IMAP now only works 50% with Mail on his Mac.
He can receive, but he cannot send.
This has been a problem with Yahoo! IMAP for *years*. I always have found a way to make it work, but it looks like Big...