Mail won't accept password or quit

[Sarcany]

JEB wrote:
After "Taking all accounts offline: and running the Connection Doctor it says: "trying to log into this POP account failed.Verify that the username and password are correct." and "Could not connect to this SMTP server. Check your network connection and that you entered the correct information in the Account preferences. Also Verify that the server supports SSL.If it does not, deselect the the "Use SSL" checkbox in the Advanced tab of the Account preferences.

The problem appears to be the Outgoing email settings for the account. If you set up the account using the default options in Mail then it's set to automatically manage connection settings. Sometimes those automatic settings are wrong and you have to set it up manually with the appropriate port-number.

Can you find the appropriate SMTP settings for your email server with a Google search?

Otherwise, can you tell us which email service you use so we can look up the settings for you?