On 2021-12-03 14:58, Konstantin Ryabitsev wrote:

On Fri, Dec 03, 2021 at 11:52:58AM -0800, Elijah Newren wrote:

quoted

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

The right person to contact is postmaster@vger.kernel.org, however I can
actually answer your question (despite not actually being in charge of
vger.kernel.org). Periodically, Gmail decides that there's just too much
incoming mail for some accounts and will arbitrarily delay delivery by
returning a "this account is receiving too much mail, please try later."

I am willing to bet that this is what happened to you.

I have already contacted postmaster and they are aware, however you add
very good point. Somehow I knew it but it's the way you put it that made
me realize: the emails are sent in bulk to gmail (to many or all
recipients for a single copy at once). The mail header even shows this,
listing the first recipient followed by "+ 99 others". If it's delayed
for all because of a single recipient that can only be because the 4xx
error is returned at the end of the DATA command (rather than on a
specific RCPT TO command), so no way for the sender to retry that single
faulty address alone later.

I'm not sure if their software allows it but I suggested sending to a
single recipient at a time for gmail, that would solve the issue.

In the meantime what I did is switch my subscription to another email
using a forwarder address on a domain I own - I still haven't received
all the backlog but at least I'm getting new posts timely now.

Regards,

--
Thomas