Prompt to fix one's email

As a foreword, I hope this message isn't offtopic for this part of the forum, and I'd like to render my fullhearted apologies if it is.

Well this is odd.

I last received the dailyish 2026/10/17 and then nothing (from Permies; all other email delivery was apparently going ok) since then. 2026/10/20 I received a warning that I'd generated multiple bounces and needed to "fix" my email. I was able to do so, hence why I am now talking to you all here.

I run my own email server, and while I'm not really fully keeping up on logs, as I said, all other delivery had apparently been going perfectly fine. (I suppose I should actually go through my mailserver logs, on both systems (my mail server is spread across two computers), with a fine-toothed comb...)

I recently received the "fix" email regarding an Outlook .com address attached to my login.

The account was still live with storage space available, but I hadn't logged in for a long while. I wonder if Outlook decided the Permies stuff was recurring spam and started blocking it?

Anyway, I did the "fix" and while it was a minor nuisance it wasn't a big deal.