Avoid emails sent to Yahoo being queued

S

shirokoweb

Verified User
Joined
Nov 22, 2014
Messages
5
Hello, I recently had an issue with an fresh email account a client created with standard name : [email protected]
For no reason He were unable to send emails to Yahoo! accounts. The typical response message was :

Objet : Warning: message 1YpGJ9-0001IQ-1n delayed 48 hours

This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 48 hours on the queue on server.web-plus.pro.

The message identifier is: 1YpGJ9-0001IQ-1n
The subject of the message is: =?utf-8?Q?Demande_de_Contrat_de_profession?=
=?utf-8?Q?nalisation_//_St=C3=A9phane_PLANET?=
The date of the message is: Mon, 4 May 2015 15:19:21 +0200

The address to which the message has not yet been delivered is:

[email protected]
Delay reason: SMTP error from remote mail server after MAIL
FROM:<[email protected]> SIZE=679440:
host mx-eu.mail.am0.yahoodns.net [188.125.69.79]:
421 4.7.1 [TS03] All messages from 5.196.77.218 will be permanently
deferred; Retrying will NOT succeed. See
http://postmaster.yahoo.com/421-ts03.html

No action is required on your part. Delivery attempts will continue for some
time, and this warning may be repeated at intervals if the message remains
undelivered. Eventually the mail delivery software will give up, and when
that happens, the message will be returned to you.
Click to expand...

The server DOES NOT send spam, checked every single file on system + logs, limit is 200 / days / user.
DKIM is set on every email account
Server IP is not blacklisted mxtoolbox

I contacted Yahoo to unblock the IP from their database, and here is the response :

Hi,

Thank you for contacting Yahoo Mail.
We aren't able to guarantee consistent Inbox delivery for your mail, but we've made appropriate changes to the IP address(es) in our database. This should help with delivering mail to the appropriate Yahoo Mail folder. How your reputation is seen within the industry represents an extremely important aspect toward achieving consistent Inbox delivery to your recipients.
It's important to know that Yahoo Mail users are able to set their own preferences, including marking received email as spam.
For ways to improve your sending reputation, we suggest you review the following articles:
  • Ensure uninterrupted SMTP access and prioritized deliverability
  • Best practices for bulk mail senders and postmasters for sending to Yahoo Mail
  • Yahoo Mail deliverability FAQs

Another option is to register for the Complaint Feedback Loop program.
Yahoo Mail offers a free program to help email senders minimize complaint rates. If you participate, Yahoo Mail forwards complaints from our users about emails sent from your organization. For more info, check out our help article about the Yahoo Complaint Feedback Loop.
Our privacy policies prevent us from divulging additional information, which means we're unable to offer further help for your request.
Thank you for your patience.
Regards,

Frank

Yahoo Customer Care
http://help.yahoo.com
Click to expand...

Meanwhile, the client tried to resend email to his Yahoo! contact (+/- 5 times).
Now ALL emaiols he tries to send to Yahoo! go to queue....
What can I do in order to avoid emails sent to Yahoo go to Email queue please ?

Thanks in advance
 
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