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We can receive mail from external users but we cannot send mail to external recipients RRS feed

  • Question

  • Hi, We have an AD contoso.com.ph

    With subdomain subdomain.contoso.com.ph

    We installed exchange 2010  to  subdomain.contoso.com.ph

    Mail addresses are like user@subdomain.contoso.com.ph

     

    We can receive mail  from external users but we cannot send mail to external recipients

     

    Cannot send mail to user@contoso.com.ph with error #550 5.1.1 RESOLVER.ADR.RecipNotFound; not found ##

    Cannot send mail to gmail and yahoo recipient.. It just queues up in exchange

    Send connector network is u”use MX records to route mail automatically”

     

     

    Any known issue?

     

    tnx

     

    Tuesday, November 26, 2013 3:12 AM

All replies

  • Hi Mgerio,

    Check if you have subdomain.contoso.com.ph in the accepted domain list

    Is it happening for all domains or for particular domains
    If its happening for all domains Was there any recent change on firewall settings
    If its happening only for yahoo & gmail domains then please try dropping an email
    through telnet  to yahoo id or gmail id and see if its successful
    Enable verbose logging on the send connector and see if it gives us any information in the verbose logs
    Try message tracking and see where the delivery gets failed

    Also you can try with creating a dedicated send connector for Yahoo and gmail and try dropping an email to them and check if its successful

    Let me know if you need any help on this

    Please mark as helpful if you find my contribution useful or as an answer if it does answer your question.
    That will encourage me - and others - to take time out to help you.
    Regards,
    Sathish

    Tuesday, November 26, 2013 3:40 AM