If you care about nature, you may ask your recipients not to print your emails.
Just add a green message addon to your signature by following these steps:
Step 1.
Click Addons tab in the signature editor.
Step 2.
Choose the Green message from the list of available addons.
Step 3.
Choose a type of green message from a drop-down list - one of the ready ones or with your custom text.
Step 4.
Choose one of the icons or set it to none.
Step 5.
Choose a font size from the drop-down list.
That's it; you have added a green message to the signature ;)