unable to receive email

Saurabh Singh 26 Reputation points
2022-08-17T12:21:33.36+00:00

External sender receiving rejection email when sending email with photos to one of our internal recipient.
tried sending a regular mail to the internal address and successful.

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Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
4,160 questions
Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
7,330 questions
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  1. Rafael da Rocha 5,076 Reputation points
    2022-08-17T16:06:47.053+00:00

    Hello,
    In message tracking you should be able to get more details why the message was rejected.
    Maybe a mail flow rule configured to reject a specific file extension?