Setting Up Google Workspace Connectors and Rules for Seamless Email Stamping via ExSign Agent

ExSign Email Signatures for Microsoft Exchange Server
1. Configure Gmail Settings (Google Admin Console)
1.1 Open Gmail Settings
  1. Go to:
     https://admin.google.com/
  1. Navigate to:
     Apps → Google Workspace → Gmail
 
 

 
 
 
2. Configure Mail Routing (Host Setup)
2.1 Add New Route
  1. Go to Hosts
  1. Click Add Route


  1. Configure the following: 
    • Name: ExSign Smart Host
    • Host Type: Single Host
    • Port: 25
 
  1. Enable: 
    • ✔ Require mail to be transmitted via secure TLS connection
  1. Save the configuration
3. Configure SMTP Relay Service
  1. Navigate to:
     Gmail → Routing → SMTP Relay Service
 
 
 


  1. Click Add Another Rule



  2. Configure: 
    • Rule Name: SMTP Relay Service Rule
    • Allowed IP Addresses: Add server IP(s)
    • Encryption: TLS required
  1. Save the rule
4. Configure Content Compliance Rules
4.1 Open Compliance Settings
Navigate to:
 Gmail → Compliance → Content Compliance

 

Click Add Rule
 

4.2 Rule Configuration
Set the following:
  • Rule Name: ExSign Content Compliance Rule
  • Scope: 
    • ✔ Outbound
    • ✔ Internal Sending
  • Condition: 
    • Apply rule if ALL conditions match the message

4.3 Add Expressions (Filters)
Expression 1
  • Location: Envelope Sender
  • Match Type: NOT contains text
  • Content : google.com
Expression 2
Expression 3
  • Location: Full Headers
  • Match Type: NOT contains text
  • Value: X-ExSignProcessed
4.4 Action Settings
If conditions match:
  • ✔ Change Route
  • ✔ Require secure transport (TLS)


Route Selection:
Select:
  • ExSign Smart Host (created earlier)



4.5 Apply to Groups
Select the Groups for which email routing should be applied.

5. Final Step
Click Save to apply all configurations.

Notes
  • Ensure OAuth consent screen is properly configured before creating credentials
  • SMTP relay IP must be whitelisted in Google Workspace
  • TLS encryption is mandatory for secure mail flow
  • Apply routing only to required groups to avoid full domain impact
  • Always perform testing before production rollout
 
For any further query, feel free to send an email to support@hostingcontroller.com.
Article ID: 3500, , Modified: 8/5/2026 at 2:38 PM

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