Step 1 : - Windows: Click the hamburger menu on the top right and select Settings.
- Mac: Click the Thunderbird menu on the top left and select Preferences
Step 2: Select the Security tab and then the Password tab. Then select "Saved Password"
Step 3: Select and remove the two passwords associated with your IMAP account username.
Step 4: Sign out and reopen your Thunderbird and enter your new password when prompted.
Step 5: Send a test email so that you will be prompted to re-fill the updated password for the outgoing email.
