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Google Workspace Email Signature Setup: Deployment Methods

Auto-Inject, server-side or hybrid? Compare Google Workspace email signature deployment methods, plan tiers and the correct order of setup steps.

WiseStamp for IT › Google Workspace › Step 1 of 12 — Setup Overview


Audience: IT manager / system administrator. You will need Google Workspace super administrator rights for most setup steps.


The deployment methods

WiseStamp applies signatures either client-side (before send) or server-side (after send). You can combine them (hybrid).

Client-side options

Option

What it does

Best for

Plan

Google Workspace App + Auto-Inject

Admin deploys the WiseStamp app to the domain; signatures are pushed directly into employees' Gmail settings the moment they’re activated

Organization-wide client-side rollout

Basic+

Chrome Extension

Per-user browser extension; supports multiple signatures; works in Gmail and Outlook web

Users who need multiple signatures or browser-based control

All plans

Google Connect

OAuth connection that inserts one signature into one Gmail account

Individuals; one signature per Gmail address

All plans (incl. Legacy Free)

Server-side

Server-side (Gmail routing)

When applied

After send, in transit through WiseStamp’s cloud

Coverage

All devices and clients (desktop, mobile, web, CRM) — nothing installed for users

What you configure

A send route + SMTP relay + content compliance rule in the Google Admin Console

Plan

Platform or Enterprise

Hybrid

Hybrid runs client-side and server-side together. The client-side signature applies first; the server-side service only appends a signature when it does not already detect a WiseStamp signature, preventing duplicates. Hybrid requires Platform or Enterprise.


Which method should I choose?

  1. Need signatures on every device and client (mobile, CRM, non-Gmail senders) with nothing installed per user? → Server-side. Platform or Enterprise.

  2. Want centralized client-side deployment that writes the signature straight into Gmail for all staff? → Auto-Inject via the Google Workspace App. Basic+.

  3. Need both Gmail-visible signatures and guaranteed coverage everywhere else? → Hybrid. Platform or Enterprise.

  4. Just individuals or a few users, or on a plan without server-side? → Chrome Extension (multiple signatures) or Google Connect (one signature, one account).

Trade-off: server-side guarantees coverage and removes per-user dependencies, but routes outbound mail through WiseStamp and requires Gmail routing + compliance-rule changes. Auto-Inject avoids mail-flow changes but only covers Gmail (the signature lives in the user’s Gmail settings).


Plan requirements at a glance

Capability

Minimum plan

Google Workspace integration + Auto-Inject

Basic

Chrome Extension / Google Connect

All plans

Auto-sync employee details from directory

Basic

Server-side deployment + signature rules

Platform

Single Sign-On (SAML)

Platform

Roles & permissions

Platform

See Google Workspace IT Admin Guide for the full tier matrix.


Order of operations

  1. Confirm prerequisites — Google Workspace setup, plan tier, super admin rights, network/IP allowlist and DNS (for server-side). → Prerequisites Checklist

  2. Connect your Google Workspace directory — imports and syncs employees. Required for centralized deployment. → Connect Your Directory

  3. Deploy signatures using your chosen method:

  4. (Optional, Platform/Enterprise) Configure SSO for admin sign-in. → SSO with Google Workspace (SAML)

  5. (Optional) Scope which employees sync by OU/department. → Scope Employee Sync

  6. Activate employees and validate. → Go-Live Checklist

  7. Hand off to employees and move to ongoing operations. → Employee Rollout Handoff, Ongoing Admin Guide

Key dependency: connecting the directory does not by itself put signatures on email. You must also enable Auto-Inject and/or configure server-side.


What WiseStamp accesses on your domain

  • Google Workspace App (directory + Auto-Inject): installed domain-wide from the Google Workspace Marketplace; used to import employees, sync details, and inject signatures into Gmail.

  • Google Connect: per-user OAuth to write the signature into that user’s Gmail settings.

  • WiseStamp states its Google integration adheres to the Google API Services User Data Policy, including Limited Use requirements.

The exact Google OAuth scopes are confirmed — see Permissions Reference.

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