Hi all,

First time posting. Hoping someone with Charter/Spectrum-side visibility
can take a look or point me to a working contact path.

My personal/family domain hendricks.nu (Google Workspace, in use ~10 years,
low volume, a handful of personal emails per week) is being rejected by
Charter/Spectrum at the sender level. Bounces look like:

  550 5.1.0 <[email protected]> sender rejected. Please see
  https://www.spectrum.net/support/internet/understanding-email-error-codes
  for more information AUP#In-1010

This affects mail to charter.net, chartermi.net, and presumably the other
Spectrum-managed domains. The block appears to be on the sender address or
domain rather than the sending IP (a Google Workspace shared outbound).

What I've checked and done:

- Auth is clean: SPF pass (include:_spf.google.com), DKIM pass with a
custom 2048-bit key d=hendricks.nu (I recently moved off the default *.
gappssmtp.com signing in case that was a contributing factor), DMARC
p=reject with full alignment. mail-tester.com scores 10/10.
- [email protected] now returns 550 5.1.1 recipient rejected. The mailbox
appears to have been decommissioned, presumably as part of the late-2024
email platform conversion.
- I sent a delisting request to [email protected] a day or two ago (from
Gmail, with full bounce details, auth status, and remediation summary). No
bounce, no response yet.
- Re-tested sending from [email protected] to a non-existent charter.net
address. Still getting AUP#In-1010, confirming the sender-level block is
still active.

The affected use case is genuinely personal. My dad sends to a handful of
Charter-subscriber recipients (family and friends) and his mail is being
silently dropped on their end. Not a bulk sender, not a marketing list,
nothing on any public RBL that I can find.

Is there a currently-working contact path for sender delisting at
Charter/Spectrum that I'm missing? Or if anyone Charter-side is reading and
willing to take a quick look at hendricks.nu, I'd very much appreciate it.

Thanks,
Kyle Hendricks
[email protected]
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