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Google Workspace

Connecting MXGuard as an external gateway in front of Google Workspace (corporate Gmail).

Target server

The target server for Google Workspace looks like:

aspmx.l.google.com

Enter it in the MXGuard panel when adding the domain.

Allow inbound connections from MXGuard

In the Google Admin Console → Apps → Google Workspace → Gmail → Advanced settings → Inbound gateway. Add MXGuard's IP addresses:

88.198.102.232/29
62.76.100.176/29
62.76.113.32/27

Enable "Reject all mail not from gateway IPs" so Google only accepts mail from our servers.

SPF for Google Workspace

v=spf1 include:spf.mxguard.net include:_spf.google.com ~all
If you send outbound mail through Google Workspace, also set up DKIM via Google Admin Console → Apps → Gmail → Authenticate email.