Apple Mail won't login after Migration Assistant transfer

Question

I recently used Migration Assistant to bring data to a new Mac Mini from a Time Machine backup on my old Mac. After finishing, I am unable to connect to my mail account as it gives the error "unable to verify account name or password". I know for a fact that my password and account are correct, because I can still log into that mail account on my old machine using those credentials.

I have tried:

• restarting
• deleting the existing mail account and trying to add the account back
• Removing keychains related to mail from my keychain access under 'login'

Any help would be appreciated. Thanks!

Answer 1

I found a solution after searching around and trying things.

The answer here led me to the solution. What worked for me from that post was deleting the folders in ~/Library/Keychains that had super long names of numbers and letters. Then I restarted the computer and tried to log in to mail and everything worked.