On Tue, 2019-07-16 at 22:55 +0200, Laszlo Ersek wrote:
> something must have gone wrong -- I don't see your message in my list
> folder, and I haven't received a moderation request either. Do you have
> an idea why your message may not have reached the list, or been
> reflected by the list?
> 
> The <mail-archive.com> list archive is missing your message too:
> 
> http://mid.mail-archive.com/bd9d4d7cc0fcdcb7e909f9bdf76f9d8bb050327d.camel@infradead.org

It was rejected, with a message saying "Your account is bouncing.
Please visit the web site to unbounce your account."

I have just done so. I did wonder if it actually meant that its email
to me was bouncing — but apparently not, since if that was the case
then it'd have a bounce message or an SMTP rejection to show me. It
didn't; just a link to click to "unbounce" my account. So I've no idea
what that's all about... just groups.io weirdness?