

There are probably others, but I've pissed away so much time being stubborn about this that I have zero interest in looking further. And.I don't even remember all the other things I tried. Switching back and forth between TLS/SSL and *not* TLS/SSL (and yes, I used the right port settings).

All attempts to delete it led to a UNIX( error, whatever that is. Trying to delete the expired certificate. Including:ĭeleting the mail account and adding it back. Mac Mail Sierra Certificate Problem I'm using a late-2016 MacBook Pro, with Retina display and the horrible touch bar.įor *months* I've had a recurring error checking my work email account: "Mail can not verify server identity."
