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JohnFoRP
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Ntlworld.com email address bounced

I am trying to send an email to someone who sent a message to the contact page on our website.  The address is in the form  @ntlworld.com  I receive the following message

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [removed]
    all hosts for 'ntlworld.com' have been failing for a long time (and retry time not reached)
 
Reporting-MTA: dns; oin.idp365.net

Action: failed
Final-Recipient: [removed]
Status: 5.0.0

Is there a new address that replaces ntlworld.com?

 [MOD EDIT: Personal and private information has been removed from this post. Please do not post personal or private information in your public posts. Please review the Forum Guidelines]
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Graham_A
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Re: Ntlworld.com email address bounced

No there isn't.

I have asked the Moderators to remove the private email address that you have posted.

Have you researched rfc822 5.0.0 error code?

________________________________
Graham

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Anonymous
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Re: Ntlworld.com email address bounced

@ModTeam didn't do a good job

Email in the link still
Graham_A
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Message 4 of 15
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Re: Ntlworld.com email address bounced

The one in the link is made up.  They have removed the valid ones.

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Graham

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ravenstar68
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Message 5 of 15
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Re: Ntlworld.com email address bounced

That's a weird error to see in a bounce message

 all hosts for 'ntlworld.com' have been failing for a long time (and retry time not reached)

Now were I running those mail servers, I'd be doing some digging into why they've been "failing for a long time" rather than sticking that error message on the bounce messages.

Were this really the case then they also wouldn't be able to send to:

virginmedia.com
blueyonder.co.uk
virgin.net

As all four domains use the same MX record. 

Tim 

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JohnFoRP
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Re: Ntlworld.com email address bounced

That is technically interesting but as all the alternatives to ntlworld.com get the same response it does not help me solve the problem.

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ravenstar68
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Message 7 of 15
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Re: Ntlworld.com email address bounced

The point is that I would ask the tech support on the sending side what is happening here.

I know for a fact that the Mail Exchangers are working as if they were really down the Forum would be flooded with with complaints.  Are you able to send me an email to my own domain if I pass you my email address?  I want to look at the sending path properly.  It may give me some useful information as to what is happening

Tim

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JohnFoRP
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Re: Ntlworld.com email address bounced

I am happy to send you an email directly  I run the website and membership list of our charity with over 600 members  This is the first time I have come across this problem and my expertise is limited.  I am grateful for your help.  As the contact is not a member I have no way of contacting them other than by email.to inform them about the problem.

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ontheridiculous
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Message 9 of 15
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Re: Ntlworld.com email address bounced

We have a .ntlworld address and have had the same problem from the 27th May. Looking forward to the answer.
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ravenstar68
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Message 10 of 15
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Re: Ntlworld.com email address bounced

It looks to me as if Virgin Media are choosing to reject mail servers which look suspect.

Things I note:

  • Domain has no SPF/DKIM/DMARC records.
  • Server identifies itself with a nonexistent hostname.
  • Server has a Reverse DNS entry that does not match the SMTP banner
  • Reverse DNS hostname does not resolve to the same IP address as the server.

Now I must stress I AM NOT CALLING YOU A SPAMMER, but because your mail server is not set up correctly, Virgin Media's server thinks you are (I suspect they may have made this change recently to try and cut down on the deluge of spam).

SPF/DKIM/DMARC aren't absolutely necessary but are recommended in order to protect your domain from being spoofed by spammers.

Best practice for running a mail server says the following.

  • The server SHOULD be on a Static IP address - Pass
  • The server should identify itself with it's fully qualified domain name (FQDN) - ?
  • The FQDN given in the SMTP banner SHOULD resolve to the address that matches the connected IP - fail
  • The rDNS of the connected IP SHOULD resolve to FQDN of the server. - fail

Consider my own server

  • Hostname in the SMTP banner is box.timothydutton.co.uk
  • box.timothydutton.co.uk resolves to 77.68.89.100
  • 77.68.89.100 reverse DNS resolves to box.timothydutton.co.uk

While some mail administrators will accept mail from servers that don't match these criteria, it would still push your spam score up.  You should always make sure that your outbound server follows the above guidelines in order to ensure that your mail is delivered successfully.

Tim

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