This article will explain how to add your Google account calender to your 123-reg webmail.
Login to the 123-reg webmail.
Click on the Configuration icon in the main toolbar.
Click on Messaging in the menu on the left hand side.
Fill in the name of your Twitter account and select Twitter as the Type.
Then click New Account.
Enter your Twitter username and click Ok.
A new window will appear, if it doesn't you need to allow Pop-Ups.
In the new window, fill in you Twitter account details and click Authorize app.
Return to your webmail and click Save.
Your will now receive Twitter notifications to your 123-reg webmail account.