Outlook prompts for password on att.net virtually every time I send email from PC
When I'm at my PC doing email and try to send a message, Outlook 2016 hangs with the message(s) in the outbox. Then a prompt box comes up asking for my password. The password is already filled in. If I just click to respond, the box disappears, the program hangs again, and the password prompt eventually reappears. When I check the "Remember this password" box before clicking, the message(s) are sent.
I don't know if this has anything to do with it, but this behavior started after I set up my cell phone to retrieve email from my att.net account. I rarely have my phone on when at my computer. My phone is set up so it does not remove messages from the att.net server when it downloads.
Over the years att.net has had this problem with email clients several times, only to have it magically go away eventually. But in those cases my wife's account exhibited the same behavior. In this instance it's only my account that's acting up. It's driving me nuts. Please help.