How to set up Thunderbird? | POP3 or IMAP

This article applies to 123-mail

This article will explain how to setup Thunderbird with POP3 or IMAP

Tutorial Video

First you must decide whether you would like to use the POP3 or IMAP email protocol.

POP3 is the standard protocol for receiving email from a mail server and it allows you to download all of your emails to one location.

IMAP is best if you access your email from multiple locations, clients and devices as it doesn't require downloading of your email content. We recommend using IMAP settings on Windows Live because if anything were to happen to your computer or mobile device, you would still be able to access your emails.

To find out more about the POP3 and IMAP protocols, watch the following support video.



If this is the first time you have accessed Mozilla Thunderbird, it will automatically start the Mail Account Wizard. Enter your name, email address and password then click Continue.

Tip: If this does not happen then click on the Tools menu, then click the Account Settings option and click the Account actions option and then click on Add Mail Account.


If you receive the message Thunderbird failed to find the settings for your email account Select POP3 from the Incoming drop down box and input the Incoming and Outgoing server details manually.

The Incoming server setting is

The Outgoing server setting is

Make sure to input your full email address into the Username field


After manually inputting the server settings click the Re-test button.

This will auto fill the Port, SSL and Authentication fields.


Click Done to finish adding your 123-reg email account to Thunderbird.

Please note: If you are using 123-reg's SMTP server to send outgoing email, SMTP authentication must be turned on. If you are asked for a username and password, please use your mailbox username and password. For further information, please visit


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