With Mail open, go to Preferences > Accounts.
In the Outgoing Mail Server (SMTP) line, click the Up/Down arrows
Choose "Edit SMTP Server List"
Highlight the SMTP server that keeps asking for your password and then click Advanced.
I suspect that the Authentication line is set to Password and the User name has your email name in it, both good things.
The password line is the one that is incorrect. Change it to the new, and hopefully improved, password.
Click OK and close out the Preference pane.
You should now be able to send and receive emails.
Let us know.
Suddenly, without previous warning...
Every time I try to send an email via Mail, I get this reaction:
"The SMTP server “smtp-mail.outlook.com” rejected the password for user “firstname.lastname@example.org” "
I have input the password, changed the password, tried again and again — without result.
I cannot send any email, but I HAVE received some email!
Mac OSX. Version 10.6.8
Processor 2.53 GHz Intel Core 2 Duo