postmaster support? 554 dnvrco-cmomta01 cmsmtp ESMTP server not available AUP#O-1000) - Time Warner Internet

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This question is about "postmaster support? 554 dnvrco-cmomta01 cmsmtp ESMTP server not available AUP#O-1000)", with Time Warner Cable internet and apps. I run a small mail server at home and have for many years. The last few days I've discovered that outgoing mail is no longer being relayed. Server here is running Postfix, my relayhost setting was set to smtp-server.austin.rr.com, but I've just updated it to mail.twc.com with no change.

When my system attempts to send an email, I see this in my logs:



Oct 26 10:38:40 wrights-Mac-mini postfix/smtp[86673]: 3064C305F344: to=<xxx@xxx.com>, relay=mail.twc.com[107.14.73.68]:25, delay=1552, delays=1550/0.01/2.2/0, dsn=4.0.0, status=deferred (host mail.twc.com[107.14.73.68] refused to talk to me: 554 dnvrco-cmomta02 cmsmtp ESMTP server not available AUP#O-1000)



Again, this only started a few days ago and my system had been running fine for years.



Roadrunner and TWC used to have a web page just for postmasters to help with mail server issues, I'm not finding any such page on Spectrum's site and do not know who there I can contact regarding this issue. Normail support staff will have no knowledge of mail server setups or be able to help.



Any assistance is appreciated.

postmaster support? 554 dnvrco-cmomta01 cmsmtp ESMTP server not available AUP#O-1000)?
 
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