Email Signature for Gmail

An email signature for Gmail is configured in one of three ways. Individual users set it manually under Settings > See all settings > General > Signature, where they paste HTML or use the basic rich-text editor. Google Workspace admins set organization-wide footers via the Admin console (compliance footers) or assign signatures per-organizational-unit. Email signature management platforms deploy signatures programmatically via the Gmail API, writing to each user's `sendAs` settings via OAuth-authenticated requests. The Gmail interface displays the signature only on web and the Gmail mobile app; signatures set in Gmail web do not automatically appear when users send from third-party clients (Apple Mail, Outlook) connected to Gmail via IMAP. For organizations needing universal coverage across all sending paths, server-side stamping via Google Workspace routing rules ensures the signature appears regardless of client. The mobile Gmail app uses a separate per-device signature unless centralized management is in place.