Mailing List Message #94582
From: Rubens Lehmann <>
Subject: RES: Yahoo mail relay problem
Date: Thu, 3 Apr 2008 09:41:20 -0300
To: 'CommuniGate Pro Discussions' <>
X-Mailer: Microsoft Office Outlook 12.0



Got the same here, please read and its folow-ups:


You may start from here:


Get prepared to fill several forms and to wait about a week for each answer, I’ve started on early january and got final answers yesterday.


Unfortunatelly, as we couldn't reach a solution on defining what can be or not systematically delivered to Yahoo,  I'm working right now to keep traffic to them restricted to a minimum.






De: CommuniGate Pro Discussions [] Em nome de Lyn
Enviada em: quarta-feira, 2 de abril de 2008 12:18
Para: CommuniGate Pro Discussions
Assunto: Re: Yahoo mail relay problem


I'm having the exact same problem. At first, I thought our server may have been blacklisted by Yahoo. Of course, I called and emailed numerous times and they have not yet answered my pleas for help.




On Apr 2, 2008, at 9:46 AM, Datta. S Wajapey wrote:

Dear All,

        We are having some serious problem in sending out all messages to yahoo. Earlier, it was observed that the bulk mails were getting delayed but successfully used to relay to yahoo after a little time. Since last week, its noticed that the emails just hang on the queue and fail to relay. It usually gives one of the following errors.

We don’t have any other problem in relaying messages to any other domain. Any ideas?

message text rejected by 451 Message temporarily deferred - [250]

message text rejected by 421 Message temporarily deferred - 4.16.51. Please refer to

message text rejected by 451 Message temporarily deferred - [140]

message text rejected by 451 Resources temporarily not available - Please try again later [#4.16.5].

There is no responses for the queries registered with yahoo.

Best Regards

Datta. S Wajapey


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