Re: Large delays in mailing list delivery?

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

On Fri, 3 Dec 2021 11:52:58 -0800 Elijah Newren wrote:

> Are there some rather large delays in mailing list delivery these
> days?  Anyone know who to contact to investigate?  [*]

I've got E-Mail delays so large that I manually crafted In-Reply-To
etc. to reply to this :)

I'm 99% sure it's some weird thing at GMail, and nothing to do with
kernel.org.

When I've experienced delays (sometimes of half a day or more) both
https://public-inbox.org/git/ and https://lore.kernel.org/git/ have been
updated.

Konstantin Ryabitsev notes (and would be in a position to know) that
GMail throttles delivery (with an smtp 451 error?).

But the other day when Junio sent out a What's Cooking and I saw it on
lore, but it wasn't in my mailbox for some hours. That time I looked a
bi tinto it.

I went into the gmail UI and searched for rfc822msgid:$id, nothing. It
was neither there on IMAP or in the UI.

However when the E-Mail finally arrived I looked at the raw headers, and
all the "Received" headers (including GMail's own internal routing) were
within a couple of minutes of Junio having sent the mail (and in the
meantime it went through vger etc.).

So, I'm hazy on E-Mail infrastructure details these days (but worked no
it in a past life), but that really seems to me like GMail in fact got
the E-Mail, but it was just sitting in some local queue of theirs before
it got served to me.

Right now I can't see the mail I'm replying to in my inbox[1], but I can
report the full headers once it arrives if that helps.

1. A search for:
   rfc822msgid:CABPp-BF_xsOpQ6GSaWs9u9JcnPQT_OXP-gCsAuxPtMj-X1tgOg@mail.gmail.com