Check result of IP
104.168.171.166

This is the rDNS found:

This IP was flagged due to misconfiguration of the e-mail service or the suspicion that there is no MTA at it.


For the delist key can be sent, select the e-mail address responsible for this IP:

The rDNS must be registered under your own domain. We do not accept rDNS with third-party domains.


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