![]() This means that you can't point the MX record of your root domain to your gateway.Īs a result, your email gateway doesn't scan messages sent directly to the root domain. But you can't change the MX records of root domains, because they aren't managed by your organization. ![]() ![]() If you use an email security gateway (like Proofpoint, Mimecast, or Barracuda), you probably changed your MX records to point to the gateway so it can scan your emails. (They are free, built-in domains used during email setup.) The DNS of these root domains are managed by Google and Microsoft - not by you. If you use Office 365 and G Suite, you have a root domain. ![]() ![]() If you’re using a gateway, and your mail flow accepts emails not from the gateway, then hackers can send mail directly to your users. Hackers are bypassing email security gateways and sending phishing emails directly to Google and Office 365 root domains.
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