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Unable to sent Emails to external emails Like ( hotmail , gmail ) , in domain emails sending and receiving is working RRS feed

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    I am getting following error when i am sending emails to externally , I am running Microsoft Exchange 2010. Internal Email in a domain is working fine.

    "

    550 5.7.1 Unfortunately, messages from weren't sent. Please contact your Internet service provider since part of their network is on our block list (AS3150).

    How can i fix above problem ?

     
    domingo, 11 de outubro de 2020 19:46