It is encouraging to see some senders getting a reset. I see a large number of complaints on the learn.microsoft.com Q&A board for the same (S775) error. Ticket responses I’m seeing are ranging at least 24 hours per response on my own ticket which the last one was nothing is preventing these emails from reaching. For now, I have slowed down mail going to Hotmail/Outlook domains.

On 2/25/2026 11:50 AM, Jarland Donnell via mailop wrote:
I would appreciate the same. At this point we're looking at severe options to react to this. I'm interpreting it as anti-competitive behavior aiming to destroy other ESPs at this point. I've gone round and round with their team via tickets and they genuinely just do not give a shit.

On 2026-02-25 03:26, Matthew Francis via mailop wrote:
Frido Otten via mailop wrote on 2026-02-25 08:12:
 From my experience, some of them are lurking here as I do get direct
messages sometimes asking for more information on an issue posted here.

If that's the case, I'd appreciate a direct message from an MS lurker.  All of my MTA's are currently rate limited and I have not had a response to my
open ticket (7098423866).

Thanks,

Matt.
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John Quaglieri

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