I can't add an email account to my iMac. My iOS is High Sierra 10.13.6.

Open Keychain Access in Utilities, then either check the Password under that item, change it, or delete it and start over.

Enter the part after the @sign in the search bar.

You may have duplicate or more entries in Keychain Access.

If using a browser to login via WebMail works it's not Name or Password, but likely old passwords interfering.

There''ll be at least 2 entries, maybe more.

The trouble is that Mac Mail almost always chooses the old Passwords if you don't change or get rid of the old ones.

What happens when you try?

Was this account on the Mac ever before?

Did you ever figure it out?

Having a problem adding my email account to Mac - previously was on no problem and then started not receiving emails so I deleted account today to reload and it won't accept

Hi, if the cure here didn't help I'd start a new thread to get individual attention to your problem.