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JW_PCET
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5.1.0 Dynamic/Generic hostnames are blocked. Please contact your Email Provider

Hi

A user who is trying to send an email to ******@ntlworld.com is getting the following error message back from our mail server

"Action: failed ((5.1.0 Dynamic/Generic hostnames are blocked. Please contact your Email Provider. Your IP was xx.xx.xx.xx. Your hostname was xx-xx-xx-xx.dsl.in-addr.zen.co.uk.))
Status: 5.5.0"

The mailserver it is hitting is mx.mnd.ukmail.iss.as9143.net

The IP on the rDNS lookup matches the actual IP Address

Could you please advise if this is a setting that needs to be rectified at your end? And if not are you able to provide advise as to what settings need to be changed at our end in order to email addresses @ntlworld.com

This is the only email domain where we receive these errors

Thanks in advance

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Superuser
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Re: 5.1.0 Dynamic/Generic hostnames are blocked. Please contact your Email Provider

Read this first and post gain if you can't solve in the light of this advice:

http://community.virginmedia.com/t5/Email/Ravenstar-s-Email-FAQ-s/m-p/3157506/highlight/true#M129655

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