Upgrading POP3 to new Mailboxes

This FAQ will help you to convert your old style POP3 email to one of our newer, modern style mailboxes

To ensure that you have the best possible email service, we recommend that any of our customers using these older style mailboxes upgrade to one of our new style mailboxes by following the instructions below.

These instructions are split into 3 sections:

Step 1: Backing up your email contacts

Step 1 of 4

Log in to your 123 Reg webmail account.


Step 2 of 4

Once logged in, click the Menu icon in the top-right corner and choose the Address Book option.


Step 3 of 4

From there, select the 3-bar icon next to Contacts, then from the menu, select Export.


Your contacts will now be exported and saved to your hard drive.

Step 4 of 4

Choose the type of folder to download – either a CSV or vCard. We recommend using CSV. Then click Export.

Step 2: Upgrading your Pophost to a Mailbox

Step 1 of 2

You can now proceed to upgrading your existing POP3 box to one of our new Mailboxes.

Login to your 123 Reg control panel and scroll down to the Email section and click on the Manage Email option.

Step 2 of 2

Find the mailbox that you wish to upgrade from your email list.

Click on the Upgrade your Pophost to a Mailbox link.

Your log on username will be changed to your email address. You can use this username to log in on our Webmail Service; http://webmail.123-reg.co.uk/index.php or you can use these settings to add a mail account in your mail client such as Outlook, or Mozilla Thunderbird.

Please Note: If no forwarding exists for the pophost mailbox that you wish to upgrade you will need to recreate the forwarding with the name you would like the upgraded pophost mailbox to have, in the "Forward to" field add the popbox address that you wish to upgrade.

For more help with setting up email forwarding se the following guide: How do I set up email forwarding?

The Mail server settings are as follows:

Incoming mail server:

  • POP3: pop.123-reg.co.uk
  • IMAP: imap.123-reg.co.uk

Outgoing mail server:

SMTP: smtp.123-reg.co.uk


POP vs IMAP: Unsure of whether to use POP or IMAP when setting your incoming server details? This handy guide will explain the differences and help you make the decision: POP3 vs IMAP, which one should you choose?We do, however, recommend you used the IMAP protocol

Step 3: Importing your contacts

Step 1 of 3

Login to the 123-mail webmail.


Step 2 of 3

Access your Address Book, then click on the menu button and select import.


Step 3 of 3

You will now be asked to upload the file you created in step one. Once you’ve done that, click on the Import button.