We have recently switched over to using the Sophos UTM 9 E-mail Protection and currently are unable to receive e-mails from a few domains including samsung and mail.ru. Our settings are such:
- MX records pointing to our mail server.
- Mail server points to internal address for the sophos box under send connector.
We are able to send e-mails to any domain (including samsung and mail.ru) but we cannot receive from them. The only time I could receive from them is when I had a DNAT rule to point to the exchange server (but this only worked because it then bypassed the e-mail protection in sophos altogether).
Have I configured something wrong?
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