​How To Include Email Signatures On ALL Outgoing Messages

You can attach your email signature to all outgoing messages as well as before the quoted text (previous emails in the chain) in an email reply. This will show you how to select either or both of those options. 

Step 1: Navigate to Settings → Team Management → Edit → User Info → Email Signature → Tick the two boxes above the “Email Signature” depending on what your preferences are → Save.