On 5/12/21 7:47 AM, chris--- via Mailman-users wrote:
Hi everyone. I have a dedicated Ubuntu box that is running mailman3. I have a single email list on it. The subscriber base is about 350 users. There is a good chunk of these users that are aol.com or yahoo.com users. I've been getting complaints from the Yahoo people that mail is delayed at times, or messages that come out of order.
Looking at the mailq on the box, I can see there are plenty of emails stuck in the queue. I have all sorts of messages like this ...
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- 3576C540CB4 9917 Tue May 11 11:27:13 pcho-bounces@pchochat.com (host mta6.am0.yahoodns.net[67.195.204.74] said: 452 Too many recipients tnmpmscs (in reply to RCPT TO command))
This one's easy to fix. In mailman.cfg set
[mta]
verp_confirmations: yes
verp_personalized_deliveries: yes
verp_delivery_interval: 1
This will provide potentially better bounce processing detection, but will ensure that each message from Mailman has only one envelope recipient.
If you don't want the verping, you can set max_recipients in the
[mta] section to a small number like 5 or 10.
(host mta6.am0.yahoodns.net[67.195.204.74] said: 421 [IPTS04] Messages from 74.112.73.65 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.verizonmedia.com/error-codes (in reply to end of DATA command))
The above changes may help with this too, but depending on where your
Ubuntu box is located, you may have other issues. Presumably you have a
fixed IP address, but even so, if that address is in a netblock that
looks like home networks it may get blocked by some providers for that
reason alone.
Also, others in this thread have mentioned Verizon. Verizon recently
sold AOL/Yahoo to a private equity firm, Apollo Global Management. What
that means for the new Yahoo is still unclear. Search the web for
verizon sells aol for more info.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan