Os clientes não conseguem receber meus e-mails

Question

Estou recebendo a mensagem após enviar o e-mail para o endereço de e-mail oficial do meu cliente:

Subject: Delivery Status Notification (Delay)

This is an automatically generated Delivery Status Notification

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipient has been delayed:

     [email protected]

Message will be retried for 2 more day(s)

Technical details of temporary failure: 
Google tried to deliver your message, but it was rejected by the server for the recipient domain kentech.ie by mx.kentech.ie. [91.103.2.154].

O erro que o outro servidor retornou foi:

554-Service unavailable; Client host [mail-pf0-f169.google.com] blocked using 554-Barracuda Reputation;
554 http://www.barracudanetworks.com/reputation/?r=1&ip=182.69.185.110

Está acontecendo com muita frequência.

Qualquer ajuda será muito apreciada.

    

Answer 1

Está acontecendo com muita frequência.

Na página você vinculado a:

Sorry, your email was blocked

We are sorry you have reached this page because an email was blocked based on its originating IP address having a "poor" reputation. The "poor" reputation may have been caused by one of the following reasons:

• Your email server contains a virus and has been sending out spam.
• Your email server may be misconfigured.
• Your PC may be infected with a virus or botnet software program.
• Someone in your organization may have a PC infected with a virus or botnet program.
• You may be utilizing a dynamic IP address which was previously utilized by a known spammer.
• Your marketing department may be sending out bulk emails that do not comply with the CAN-SPAM Act.
• You may have an insecure wireless network which is allowing unknown users to use your network to send spam.
• In some rare cases, your recipient's Barracuda Spam Firewall may be misconfigured.

Essa página também contém o botão "Look IP Reputation".

Clique nele e você verá:

The IP address 182.69.185.110 is listed as "poor" on the Barracuda Reputation System. To request removal, please click here.