Forum emails are being blocked by RoadRunner, Time Warner Cable, Spectrum and Charter

[Bruce]

For some time all emails sent from our forum server have been blocked by this group of ISPs.

This is an example log entry

Aug 12 14:36:58 JetBoaters postfix/smtp[7212]: 0ABC1169AB3: host dnvrco-cmedge01.email.rr.com[69.134.155.135] refused to talk to me: 554 dnvrco-cmimta10 esmtp ESMTP server not available AUP#I-1000
Aug 12 14:36:58 JetBoaters postfix/smtp[7212]: 0ABC1169AB3: to=<REDACTED@wi.rr.com>, relay=dnvrco-cmedge02.email.rr.com[69.134.155.136]:25, delay=412146, delays=412146/0.01/0.4/0, dsn=4.0.0, status=deferred (host dnvrco-cmedge02.email.rr.com[69.134.155.136] refused to talk to me: 554 dnvrco-cmimta16 esmtp ESMTP server not available AUP#I-1000)

This action by Charter and its subsidiaries is preventing legitimate communications from our forum. When potential members from these ISPs sign up they do not receive the account confirmation email so they are unable to join. Existing members are not receiving requested notifications from the forum.

Our forum does not send any illegitimate or unsolicited email.

I have attempted to contact the postmaster at each of these ISPs without response.

I have chatted with company representatives through Facebook who "escalated" the issue but it has not been resolved.

At least three forum members who have Road Runner accounts have reached out to Road Runner without success.

It is unreasonable for Charter and its subsidiaries to precent legitimate communications.

If anyone happens to work at or have high level contacts inside these companies I would appreciate assistance in escalating this inside Charter.

Thank you

 

[Scottie]

@Bruce, I have a lot of experience in this area (you may also, i do not know). There are some other things we could do to get mail delivered if the ISPs aren't helpful. Send me a PM if I can be of assistance.

 

[Bruce]

Thanks @Scottie, I have managed SMTP servers consistently since ‘95 but have not been in the ISP role for the last few decades. We have SPF sand DKIM configured which is sufficient to verify legitimacy with most ISPs.

This action by Charter is not targeting us directly it is targeting all email coming from our ISP (DigitalOcean). I could move the server to resolve the issue but we have five years of good experience with DO so I am reluctant to do so.

 

[Scottie]

Understood. Sounds like you have it covered. And you're right of course, not much else you can do. A DMARC record might help, but in my experience if SPF and DKIM are not enough, then DMARC won't make any difference either.

 

[Bruce]

I was able to open a ticket with Spectrum's NOC who I understand to be working on the issue.

 

[Ratket]

I was able to open a ticket with Spectrum's NOC who I understand to be working on the issue.

Best resolution is to file a FCC compliant. They typically tend to get a lot of attention.

 

[Bruce]

If any Spectrum, TWC, RR or Charter customers would like to raise the email deliverability issue I believe this would be a good venue to do so.

Email

Questions about email clients and services, including webmail.

forums.timewarnercable.com