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Urgent Error - Forward-confirmed reverse DNS (FCrDNS)

‎02-23-2018 04:57

‎02-23-2018 04:57

Our Forward-confirmed reverse DNS (FCrDNS) mechanism started rejecting Fitbit messages on 22 Feb 08:20:15 (Pacific Time).

 

Our subscriber got disabled due to this problem.

 

We are receiving messages from the following IPs which cannot be Reversed DNS:

  • 169.45.146.201
  • 169.45.141.216
  • 169.45.134.250
  • 169.45.145.244
  • 169.45.141.216

 

https://mxtoolbox.com/SuperTool.aspx?action=ptr%3a169.45.141.216#

 

Please advise.

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1 REPLY 1

‎02-23-2018 08:32 - edited ‎02-23-2018 08:33

‎02-23-2018 08:32 - edited ‎02-23-2018 08:33

@FedericoArg please PM to me your app id and I'll see if I can get more insights about why your subscribers were disabled.

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