📌 Compatibility: Exchange Server 2016 and 2019

Objective

Instead of sending emails directly to the Internet, this procedure allows you to route all outbound messages from your organization through the e-securemail antispam gateways using a secure SMTP relay.

🔑 Important Information

SMTP relay server to configure:
smtp.security-mail.net

This is the address you must configure to route your outbound mail flow through the e-securemail filtering gateways.

🔒 Security Recommendation

For optimal protection of your Exchange infrastructure, restrict inbound connections by allowing only the IP addresses of the e-securemail servers.

📥 View the list of e-securemail IP ranges

📋 Configuration Procedure

Create a Send Connector Using Smart Host Routing

Step 1: Access Send Connectors

1. Open the Exchange Admin Center (EAC)
2. Go to Mail Flow > Send Connectors
3. Click Add ➕

Step 2: Configure the Connector

• Name: Enter a descriptive name
  Example: e-securemail Outbound Relay
• Type: Select either:
  • Internet
  • or Custom

Click Next

Step 3: Configure the Smart Host

1. Select Route mail through smart hosts
2. Click Add ➕
3. In the FQDN field, enter:

smtp.security-mail.net

⚠️ Important: Ensure that your Exchange servers can resolve this domain name through DNS.

4. Click Save

Step 4: Complete the Configuration

1. Review all configured settings
2. Finish the configuration wizard

ℹ️ Additional Help

For more details about send connector types and their specific use cases, refer to the official Microsoft documentation:

Microsoft Exchange Documentation – Outbound Smart Host Routing