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Home » Kerio User Forums » Kerio Connect » Satus 4.1.1 451 error (not yet authorized to deliver mail)

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Getting the following error with a new server:
Status: 4.1.1 451-''ip-address server'' is not yet authorized to deliver mail from

Never seen this error coming back on any of our Kerio servers and this new one has had 2 in one day...

What does it mean?

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Please check with your ISP if the IP address of the Kerio server has a correct PTR record.

Dexion AG - The Blackberry Specialists in Switzerland
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