All mails go to recipient spam folder

NT 26 Reputation points

Hi all,

We have Exchange server 2019 and we configured dkim on mysmtp. Dmarc record is also created. Problem we have is that all mails are going to recipient spam folder in office 365. I am really out of ideas and need help with this.

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.
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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.
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4 answers

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  1. udara peiris 671 Reputation points
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  2. Eric Yin-MSFT 4,386 Reputation points

    As Udara posts, some configuration is recipient-side.
    Does your issue occur only with some specific recipients in same configuration or it has problem with most recipients when sending external?
    This blog might help you and your recipient troubleshooting:
    Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    If an Answer is helpful, please click "Accept Answer" and upvote it.
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  3. NT 26 Reputation points

    Hi Guys,

    Thank you for your reply. Keep in mind that we have exchange 2019 on prem and the emails that we send to customers that have email in office 365 goes to spam. Our dkim is on mysmtp and dmarc is configured with reject. SPF record is valid as well. I asked clients to run submission in office 365 to check the reason why our mail is classified as spam the response was almost without any info.

    Rescan status - Completed
    Delivery details - StatusSpam
    Rescan results - Spam

  4. george garvin 1 Reputation point

    I need a number to contact a person at customer service

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