Virgin Media Community

[CWildeRE]

Hi,

We're an ESP sending emails on behalf of cleints who are receiving the following bounce error from virgin media domains (blueyonder, ntlworld, virginmedia) across multiple different domains and IPs:

SMTP service unavailable: "421 4.2.0 MXIN618 Temporary SMC Policy Violation detected, retry later ;id=KdKFlqEMxa7TsKdKFlL2Ap;sid=KdKFlqEMxa7Ts;mta=mx12.tb;dt=2021-03-12T09:39:16+01:00;ipsrc=xx.xx.xx.xx;" received from mx.tb.ukmail.iss.as9143.net (212.54.56.11) while connected from SENDINGDOMAIN.co.uk (xx.xx.xx.xx) to mx.tb.ukmail.iss.as9143.net (212.54.56.11)

 We have tried "sending later", as suggested in the error but no emails are being allowed through. Would someone please be able to help me with the cause of this error, and how we may resolve it moving forwards? I can't find any information on it online nor action I can take for it to be removed.

If there is elsewhere better to post this question, please let me know and I'll be happy to move it.

Many thanks,

Chris

[HowardML]

We do get some interesting errors from the VM mail exchangers here. This is the first I have seen with this one. The six hundred series of MXIN messages seems to be related to the data being sent which the mail exchangers are unhappy with. I shall escalate this to the VM Forum Team here so they can take it up with the people who are in contact with the mail server operation in The Netherlands. These servers are run by Ziggo Internet on behalf of the wider Liberty Media group of which VM is a part. Wait here for the reply. I shall be extremely interested to see what is going on here.

[CWildeRE]

Thanks Howard, I look forward to seeing what the issue is!

[HowardML]

Listen, you are the internet guys! What is an SMC policy error violation? I know some stuff but not this stuff.

@CWildeRE

[CWildeRE]

Hi Howard,

Was this intended for me? I can't see anything else relating to this message in the forum. Let me know if there's any more info you'd need from me.

Thanks,

Chris

[HowardML]

Yes it was for you. Do you know what an SMC policy violation is? It's in the error message. I've never the seen the term. I know what the error message code MXIN is saying, at least I think I do. Just asking and chatting.

[CWildeRE]

Ahh, sorry! Yeah not sure myself, I've never seen the SMC Policy Violation error before and suddenly we're getting quite a few. The data we're sending to is recently engaged as well so I'd be confused if data quality is a problem

[HowardML]

You and me both then. I'm not an IT professional, just someone with an interest in this world. As a VIP we get direct access to VM's team here which is why I can escalate and prevent you having to hang around for an answer, or at least get the ball rolling more quickly on finding out what is going wrong.

[CWildeRE]

Thanks for your help! I'm usually able to understand what the bounce errors mean most of the time, or actions to take to resolve it but there are a fair few like this one that leave me flabbergasted. 

[HowardML]

I've found this:

https://community.ziggo.nl/t5/Internet/Alle-Email-fails-naar-mx11-tb-mail-iss-as9143-net/m-p/738743

You might need to use Google translate to see what is going on. You are likely being greylisted for spam. That should help the VM team here get this resolved for you. I do not advise that you go direct to Ziggo on this.  

@ModTeam  - to xref with my escalation.