Unable to relay (exchange 2010) authentication issue

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    Hello, few of my users use pop3 for their emails.

    Unfortunately they cannot send e-mails to external users. Sending to internal users works fine. If i don’t use authentication

    If i use “Use same settings as my incoming mail server” or try to log on using username & password or domainusername & password the error is “Send test e-mail message: Your e-mail server rejected your login. Verify your user name and password for this account in Account Settings.”

    The error is the same if i check “Require SPA”

    So i cannot figure that out why outlook cannot authenticate to exchange 2010.

    What i miss?

    I don’t want to create another receive connector allowing anonymous relay.


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