Updating host server name in Thunderbird

You will need to update the host name twice; Once in Incoming mail settings then in Outgoing Mail settings.

• Open Thunderbird.

Incoming Mail Settings

• Navigate to Tools > Account Settings
• Select the account you want to work with
• Select Server Settings
• Click in the Field: Server Name and delete the old name
• Type in the new host server name carefully.

Outgoing Mail Settings

• Navigate to Tools > Account Settings
• Select the account you want to work with.
• Scroll Down to the bottom.
• Click on Edit SMTP Server next to "Outgoing Server (SMTP)".
• Click in the Field: Server Name and delete the old name.
• Type in the new host server name carefully.
• Make sure the username is filled in for Authentication.
• Click OK

Close Account Settings (Click on the X to close the window).
Close Thunderbird and restart it.

Confirm you can receive mail and send it using the new server name.