IMPORTANT: An "Incorrect password" error in your e-mail program
If you are receiving an "Incorrect password" error in the e-mail program on your local device (computer, phone, tablet, etc.), but you are sure that you have entered the correct password, please check your e-mail username as well.
Full instructions on configuring the most popular email programs can be found in the Configuring an e-mail program (Outlook, Thunderbird, Mail, etc.) section of the FAQ.