Apologies for a repeat post, but I think some folks from the Yahoo team
post here and I'm hoping one of them wouldn't mind an email from me off
list.
For about 2 months now we've been trying to bring up a new Postfix
server for our e-commerce site. We're fine with deliveries to every
provider apart from Yahoo managed products.
If we send a trickle of email throughout the day we're fine, but as soon
as we go above a limit of around 10 messages in 10m we get deferrals for
several hours. Backing off and trying again the next day shows the same
behaviour.
I've opened tickets with the Yahoo Postmaster site 4 times now and each
one has ended with:
"Great news! The engineers let me know that they've fixed the issue with
IP 151.236.220.98. You should be seeing improvements in deliverability
shortly."
But no dice; we slowly try to increase delivery through the new IP and
each time the deferrals start as before.
I'm aware that Yahoo do defer delivery from new IPs[1], but I'm at a
loss as to what behaviour counts as "good" to get over the deferral
threshold.
Thanks,
Gavin
[1]
https://sendgrid.com/en-us/blog/ask-the-expert-lili-crowley#span-stylefontweight-4002-yahoo-is-known-for-deferring-email-from-new-domains-and-ips-can-you-explain-why-and-what-steps-senders-can-take-to-minimize-thisspan
On 2024-05-14 10:40, Gavin Montague wrote:
Hi all,
I was wondering if anyone had any experience/suggestions regarding
warming an IP address that delivers to Yahoo managed domains (yahoo,
aol, sky.com, etc)?
We're bringing up a new Postfix instance handling outbound
transactional and marketing emails for our e-commerce site. The IP
doesn't appear on any spam-lists that I can find, we're signing all our
emails and deliverability from the sibling Postfix instances to Yahoo
addresses is entirely fine. List-unsubs & service-feedback on spam are
all acted upon automatically. As best I know: we're a good citizen.
The new server has been delivering low-volume transaction messages
(receipts, purchased vouchers, etc) for 6 weeks or so and we've been
gradually delivering lower value, higher volume content to our
subscriber list through it for about the past 2 weeks. Hotmail, Gmail,
other big providers are all entirely fine with the volume and we're
seeing accepted messages and expected levels of click-thought
afterwards.
Except for Yahoo.
As soon as we send more than a couple of messages to yahoo within a few
minutes we see...
Messages from 151.236.220.98 temporarily deferred due to unexpected
volume or user complaints - 4.16.55.1; see
https://postmaster.yahooinc.com/error-codes (in reply to MAIL FROM
command)
Messages get deferred for 6-8 hours before being accepted.
Yahoo support have said a problem with the IP was "fixed", but the
problem persists.
Has anyone had particular trouble convincing Yahoo to accept messages?
Thanks,
Gavin
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