Hola, buenas.
Yo tuve el mismo problema, el tema es el siguiente. Después de mandar masivamente correos con el gestor de correo. Yahoo y hotmail detecta que es un gestor de correo masivo y automáticamente frena los correos para esos host. Mi solución fue enviar por lotes.
Espero que te sirva.
Saludos
Pd. Discuten por mandar mal.
Estoy respondiendo de mi celular
El oct 17, 2014 7:39 p.m., "lreyes" <lreyes@ipurr.sc.sc.rimed.cu> escribió:
>
> hola amigis megustaria saber porque motivo mi postfix no me quiere enviar
> correos a el dominio yahoo una ves ke lo me manda estes error
>
> he probado con usuarios que no estan activos en los server de yahoo pero de todas formas con usuarios reales de yahoo me da el mismo error
> saludos
>
> This is the mail system at host mx.rimed.cu.
>
> I'm sorry to have to inform you that your message could not
> be delivered to one or more recipients. It's attached below.
>
> For further assistance, please send mail to postmaster.
>
> If you do so, please include this problem report. You can
> delete your own text from the attached returned message.
>
> The mail system
>
> <qwqh@yahoo.com>: host mta7.am0.yahoodns.net[63.250.192.45] said: 554
> Message
> not allowed - [320] (in reply to end of DATA command)
>
> <dfdsf@yahoo.es>: host mx-eu.mail.am0.yahoodns.net[188.125.69.79] said: 554
> Message not allowed - [320] (in reply to end of DATA command)
>
> <sacdgasjc@yahoo.it>: host mx-eu.mail.am0.yahoodns.net[188.125.69.79] said:
> 554
> Message not allowed - [320] (in reply to end of DATA command)
>
> Reporting-MTA: dns; mx.rimed.cu
> X-Postfix-Queue-ID: EA8206409F
> X-Postfix-Sender: rfc822; lreyes@ipurr.sc.sc.rimed.cu
> Arrival-Date: Fri, 17 Oct 2014 15:12:30 -0400 (EDT)
>
> Final-Recipient: rfc822; qwqh@yahoo.com
> Original-Recipient: rfc822;qwqh@yahoo.com
> Action: failed
> Status: 5.0.0
> Remote-MTA: dns; mta7.am0.yahoodns.net
> Diagnostic-Code: smtp; 554 Message not allowed - [320]
>
> Final-Recipient: rfc822; dfdsf@yahoo.es
> Original-Recipient: rfc822;dfdsf@yahoo.es
> Action: failed
> Status: 5.0.0
> Remote-MTA: dns; mx-eu.mail.am0.yahoodns.net
> Diagnostic-Code: smtp; 554 Message not allowed - [320]
>
> Final-Recipient: rfc822; sacdgasjc@yahoo.it
> Original-Recipient: rfc822;sacdgasjc@yahoo.it
> Action: failed
> Status: 5.0.0
> Remote-MTA: dns; mx-eu.mail.am0.yahoodns.net
> Diagnostic-Code: smtp; 554 Message not allowed - [320]
>
>
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