Olá,
tenho o iRedMail a correr com Centos5.x e de uma semana para cá tenho tido  dois problemas:
1º - "TESTING#1: dkim._domainkey.mydomain.com => invalid (public key: not available)" sempre que faço o teste (amavisd testkeys)
2º - Recebo mensagens de erro quando os utilizadores tentam mandar emails para hotmail e yahoo como mostra abaixo:
 
"This is the mail system at host mydomain.com.I'm sorry to have to inform you that your message could notbe 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 candelete your own text from the attached returned message.                   The mail system
<hainadine_chamane@hotmail.com>: host mx3.hotmail.com[65.55.92.136] said: 550
    OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons    for rejection may be related to content with spam-like characteristics or    IP/domain reputation problems. If you are not an email/network admin please
    contact your E-mail/Internet Service Provider for help. Email/network    admins, please visit http://postmaster.live.com for email delivery    information and support (in reply to MAIL FROM command)Reporting-MTA: dns; mail.mydomain.com X-iRedMail-Queue-ID: 751BC52012EX-iRedMail-Sender: rfc822; hainadine@mydomain.com
Arrival-Date: Thu, 13 May 2010 16:47:47 +0200 (CAT)Final-Recipient: rfc822; hainadine_chamane@hotmail.com
Original-Recipient: rfc822;hainadine_chamane@hotmail.comAction: failed
Status: 5.0.0Remote-MTA: dns; mx3.hotmail.comDiagnostic-Code: smtp; 550 OU-001 Mail rejected by Windows Live Hotmail for    policy reasons. Reasons for rejection may be related to content with
    spam-like characteristics or IP/domain reputation problems. If you are not    an email/network admin please contact your E-mail/Internet Service Provider    for help. Email/network admins, please visit http://postmaster.live.com for
    email delivery information and support"

Por favor, agradecia a vossa ajuda,

Obrigado,