You have a Microsoft Exchange Online tenant that contains 1,000 users.
A user named User1 receives a non-delivery report (NDR) when attempting to send an email message to an internal group named sales@contoso.com. The NDR contains the following text: "5.7.1 Delivery not authorized."
You need to ensure that User1 can send email to sales@contoso.com successfully.
Solution: You instruct User1 to reduce the size of the email message.
Does this meet the goal?
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