The user was trying to send a mail from internal to external domain but it is blocking by sinkhole because it is showing as malicious traffic, however, we are able to receive from that malicious domain, Can we block reverse mail from an external server to internal using DNS license. In my case, it has received. Eg- User mail is test@abc.com and trying to send malicious domain i.e xyz@xyz.com ====blocked by sinkhole policy in NGFW However, user test@abc.com received mail from malicious domain i.e xyz@xyz.com === can I control using DNS license. User should not receive an email from any malicious domain so can I control in NGFW using DNS security.
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