Routing

Configuring where clean mail is delivered for each domain and mailbox.

Domain target server

For each protected domain, the control panel lets you set a target server — the mail server address MXGuard delivers filtered mail to.

The target server can be specified as:

• Hostname: mail.company.com
• IP address: 192.168.1.10
• Cloud provider address: company-com.mail.protection.outlook.com

Delivery port

Port 25 (SMTP) is used by default. If your server accepts mail on a non-standard port, set it in the domain settings.

Per-mailbox routing

Individual mailboxes can be routed to a different server — useful in hybrid setups where some users are on Exchange and others on Google Workspace. Configure this under Users → Route for a specific mailbox.

Fallback and retries

If the target server is temporarily unavailable (a 4xx response or a timeout), MXGuard queues the message and retries on a schedule for up to 5 days. If the server stays unreachable longer than that, the message is bounced back to the sender with an explanation.