IIS Smtp Relay using Smarthost

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    I currently have this configuration:

    4 servers, each 1 role from exchange 2007

    mailbox, hub, client access, edge

    i added an extra server with 2003 r2 x64 standard so i could install GFI MailSecurity and GFI MailEssentials. on this server i configured mail relay for our domain.

    Everything works fine when i send a mail from the domain (outlook and owa)

    put when i replay from an external domain, the message never comes thru and i receive on the external account: authentication failed

    i’ve struggled many days to figure this out and i’ve came at the end of the line!

    i’ve tried removing the edge subscription and working only with the iis smtp relay but it’s the same effect!

    help would be really appreciated!!

    thanks in advance!


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