This article will explain how to add a third party email account to 123-mail webmail.
Login to the 123-mail webmail.
Click on the Configuration icon in the main toolbar.
Click on the E-mail folder in the left hand pane.
Click on the subfolder Accounts
Click on the New button under the E-mail Accounts tab.
Fill out the Account Settings details.
Fill out the Server Settings.
Make sure to select the relevant Server type from the drop down box.
Fill out the Outgoing Server Settings.
Click on Check Connection to test the account.
When successful click on the Save button the store the settings.