


If you misspell the password or type in the wrong password, the password request box will continue to pop-up… because now you really do have a password problem. If the mail server is down for maintenance, momentarily offline or overwhelmed with requests, it rejects the request from Mac Mail.Īs the most common reason for a server rejection is an incorrect password, Mac Mail mistakenly assumes this is why it’s been rejected and immediately places a box on your screen requesting a password. Mac Mail checks with the server constantly to see if you have new mail. Mac Mail, like Outlook and Entourage, must contact an external mail server in order to send and receive your email. It seems to appear and disappear without rhyme or reason.

Are you able to temporarily try to add the account having an issue being added in that user? If yes, does the same issue persist? We're asking because we'd like to see if the account can be added in another user, which can help us know if the issue is specific to one user or all users on your iMac.Almost everyone who owns a Mac encounters the pop-up box requesting a password for Mail. You mentioned you have a different user on your iMac that has a different account from the same email service provider on it that works without any issues. What happens if you select "Other Mail Account" instead of Yahoo when trying to set up your account? It appears that you're trying to put in your email and password in Internet Accounts, but see a blank screen with either an option to cancel or a message about unknown destination. I'm up to date on the latest iMac (2019) system software updates, i.e. I have another account under a different username on my iMac and it works just fine.

But this time all I get is a blank white screen with an option to cancel. username, then a screen asking for username and password. I deleted the account from Internet Accounts and then tried to add it again as a Yahoo Account. This is an account I use for newspaper columns, etc. I enter both and then I keep getting directed to a blank screen the displays "Unknown Destination." But when I go to Systems -> Internet Accounts >- and enter the username, I am then presented with a screen the requests the username and password. I logged onto Yahoo mail with the and password and saw the emails I expected. I was able to do it the first time but I can't get it to work today. In the last two weeks, it has asked me to re-enter the password. I've been using a account on my iMac and other devices for years.
