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lhozzan
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Our SMTP servers are blocked

Hello.

Today we spot warning messages, that emails from our servers are stucked in queue. Emails are from our customers to customers with domains:

virginmedia.com, ntlworld.com, blueyonder.co.uk

I see this messages without any usable information:

394E95ED5 484436 Tue Sep 8 12:39:03 support@mail.XXX.ladesk.com
(host mx.tb.ukmail.iss.as9143.net[212.54.56.11] refused to talk to me: 421 mx7.tb.ukmail.iss.as9143.net mx7.tb.ukmail.iss.as9143.net MXIN107 Connections from your IP 123.456.789.XYZ have been disallowed by admin policy. ;id=Fe6ckxPuPUcoT;sid=Fe6ckxPuPUcoT;mta=mx7.tb;d=20200908;t=155618[CET];ipsrc=123.456.789.XYZ;)
XXX@blueyonder.co.uk

3C45E5ED2 5357 Tue Sep 8 10:34:42 support@mail.XXX.ladesk.com
(host mx.tb.ukmail.iss.as9143.net[212.54.56.11] refused to talk to me: 421 mx7.tb.ukmail.iss.as9143.net mx7.tb.ukmail.iss.as9143.net MXIN107 Connections from your IP 123.456.789.XYZ have been disallowed by admin policy. ;id=FeL8kxedsUcoT;sid=FeL8kxedsUcoT;mta=mx7.tb;d=20200908;t=161118[CET];ipsrc=123.456.789.XYZ;)
XXX@virginmedia.com

37FB35ED7 12616 Tue Sep 8 11:15:45 support@mail.XXX.ladesk.com
(host mx.tb.ukmail.iss.as9143.net[212.54.56.11] refused to talk to me: 421 mx8.tb.ukmail.iss.as9143.net mx8.tb.ukmail.iss.as9143.net MXIN107 Connections from your IP 123.456.789.XYZ have been disallowed by admin policy. ;id=Fds6kqRmYdSIy;sid=Fds6kqRmYdSIy;mta=mx8.tb;d=20200908;t=154118[CET];ipsrc=123.456.789.XYZ;)
XXX@ntlworld.com

I recheck near all blacklists sites and not find any service, where we was blocked.

After one hour of googlig and thank to web page https://securitytrails.com/list/mx/mx.tb.ukmail.iss.as9143.net I finally get, where to ask for reason.

So, I would like to ask for somebody from this company, who is responsible for this problem, why is our servers blocked? Is here somebody, who can write me reason?

Best regards.

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DJ_Shadow1966
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Re: Our SMTP servers are blocked

Hello

I have escalated to the VM forum team, one of the VM staff will be along in this thread to resolve it for you.

Regards Mike

I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more

Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks

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Katie_WT
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Re: Our SMTP servers are blocked

Hi there @lhozzan

 

Welcome to our Community and thanks so much for your first post to our Forums; I was sorry to hear that some of your customers are not able to email some of ours. 

 

We can certainly contact our Internet Security team for you to see if we can see if your servers are indeed blocked and if so if we can see as to why that is. I'll need a bit more information from you that can't be posted here so I'll pop you a Private Message.

 

Please look out for the Purple Envelope and pop me a reply when you can. 

 

Cheers

Katie - Forum Team


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lhozzan
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Re: Our SMTP servers are blocked

Hello @Katie_WT .

Thank you for your effort. I hope, that I send you all neccessary information via PM. I looking for your answer.

Best regards.

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Katie_WT
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Re: Our SMTP servers are blocked

Thank you so much for that information via the Private Message - I picked it up this morning and have already sent the information over to our Internet Security team to take a closer look for you. Once I have any sort of reply I shall let you know.

 

Thanks for your patience whilst we get this investigated for you. 

 

Cheers

Katie - Forum Team


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Bra1n
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Re: Our SMTP servers are blocked

Looks like virginmedia MTAs are in a block list

550:550-"JunkMail rejected - know-smtprelay-omd-8.server.virginmedia.net
550-[81.104.62.40]:45287 is in an RBL: Blocked - see
550 https://www.spamcop.net/bl.shtml?81.104.62.40"

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Katie_WT
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Re: Our SMTP servers are blocked

Thanks @Bra1n - That is what our Internet Security team are currently investigating

 

Cheers

Katie - Forum Team


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Bra1n
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Re: Our SMTP servers are blocked

Looks like it got removed recently as I can now send emails again

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lhozzan
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Re: Our SMTP servers are blocked

Hello @Katie_WT .

Today I rechecked situation and queue is empty. It seems, that our servers isnt blocked anymore. Thank you for your effort.

I would like to suggest you to open discusion about errors messages return to sending server. Some tool for autmatic unblocking should be more valuable, than public forum, for third party (= not your direct customers).

Please, consider my problem as solved.

Best regards.

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Bra1n
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Re: Our SMTP servers are blocked

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