Google Workspace Routing Rules

Google Workspace routing rules are administrative rules configured in the Google Admin console that modify mail in transit. The rule type relevant to signatures is the compliance footer, which appends a standardized HTML or plain-text block to outgoing email at the Google mail server. The footer applies after the user has sent the message but before delivery, which means it appears consistently regardless of the device or client the user composed from (Gmail web, Gmail mobile, third-party SMTP clients). Routing rules support variable substitution from the user's Google Directory profile (`{{name}}`, `{{job_title}}`, `{{department}}`) but the variable set is limited and the templating engine does not support conditional logic or dynamic banner content. For organizations that need rich signatures with banner campaigns, A/B testing, analytics, or per-recipient personalization, routing rules alone are insufficient and a dedicated email signature management platform integrates with Google Workspace via the Directory API.