Using the mail.expglobal.partners webmail
Log into the email website, then click Settings > Identities > then your name. You should see the Signature window at the bottom of the screen on the right. Click the button that looks like <> to access the Source Code window.
Copy the code you received from Loop, and paste it in the box, then click Ok.
This is the sort of thing you will see:
Click Save.
You will then want to enable HTML in your emails to display your signature properly by following the instructions in the article linked here:
Displaying Email Signature Properly
Using Outlook
Different versions of Outlook may vary, but the steps are similar to the steps for Windows Mail.
Copy the table from the top of the signature page, not the code.
Using other mail clients
Currently, we are unable to support adding HTML email signatures to other mail clients. In most mail clients, copying and pasting the signature at the top of the website into the signature text box will work without further modification.