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Online Exchange with Office 365 seems to be working with my own verified domains but I am getting intermittent failure message with some incoming and outgoing external emails (especially to and from Gmail accounts). Anyone out there can help me?
I have narrowed the problem down. It seems that the [problem arises when the recipient replies to an email. If the email is sent from 'scratch' then there is no problem.
Thank you for your reply and the detailed additional feedback on the root cause what you have found in resolving this issueI believe that others who encountered the similar issue may benefit from your sharing.
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