Save different signatures for multiple email accounts

To save a signature for a different email account that is also integrated with the Mobile App:

Tap the SideMenu icon at the left of your Navigation Bar to open the Side Menu.
Tap the Gear icon at the bottom of the Side Menu to bring up Settings.
Tap Mail.
Tap Signatures.
Tap the Customize per account slider.
Tap "Add a new signature" under appropriate email account.
Enter name of the Signature Title for your signature.
Enter your signature.
Tap Done to save your signature.