How do I correct this? My user name has never changed!

Your user name = full email address.

In Account Settings select the name of the account in left pane On right Email Address: = full correct email address

At bottom on right - click on 'Edit SMTP_Server User Name = full email address. click on OK

check the stored passwords:

• Menu icon > Settings > Privacy & Security
• Scroll to 'Passwords' section
• click on 'Saved Passwords
• click on 'Show Passwords'

You should be able to see two lines. One is incoming and one is smtp outgoing. You can make window wider - grab bottom right corner and drag. Check the 'User Name' for each line.

• Right click on each line and select 'Edit Username'
• completely clear the contents and then carefully type in correct full email address. All lower case.
• When done click on 'Close'

Exit Thunderbird to ensure all data has been fully updated to relevant profile files. Allow a few moments for background processes to complete. Start Thunderbird.

can't send emails.

Please post some information. Please confirm: Did you do everything I suggested? Did you re-enter all the email address/username information in all the places I instructed. Did you restart Thunderbird afterwards?

It is important to verify what you discovered in those locations I mentioned you needed to edit.

You have said: 'can't send emails' Please provide an image of the error message.

What do you have stored in this location as you may be using the wrong SMTP setting. In 'Account Settings'. In left pane below 'Local Folders' - at the bottom you will see 'Outgoing Server (SMTP)' Click on 'Outgoing Server (SMTP)' It will show you a list of all your outgoing servers.

What do you see? Is there only one smtp listed or is there more than one? I need to check you are using the correct smtp server settings. Please post an image so we can check.

You should be using these settings:

• Server name : smtp.centurylink.net
• Port: 587
• Connection Security: STARTTLS
• Authentication Method: Normal Password
• User name: full email address

As per info mentioned at CenturyLink: https://www.centurylink.com/home/help/internet/email/how-to-set-up-your-email-server-settings-to-go-through-pop-and-smtp.html

You said: "can't send emails." Hence why the info is regarding smtp. Can you receive emails ? Do you have a complete problem both receiving and sending?

Please post this information:

• Menu app icon > Help > More Troubleshooting Information
• In the 'Mail and News Accounts' section
• Copy all the data and paste it into this forum question in a 'Post a Reply' text box.