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SMTP Issues sending out external mail

Posted on by 5

Hi 

We are currently in the process of moving to Business Central and are finding issues with sending email out to external clients getting the below message

SMTP returned error. 550 5.7.64 TenantAttribution; Relay Access Denied

We have other devices and servicedesks that use our connector without any issues sending to external emails

We use port 25 and the Anonymous and  (ourdomain).mail.protection.outlook.com

  • Suggested answer
    Nitin Verma Profile Picture
    Nitin Verma 21,023 Moderator on at
    RE: SMTP Issues sending out external mail

    Hi Wacar ,

    please follow the below link, see if you can take any idea.

    docs.microsoft.com/.../relay-access-denied-smtp

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