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Dweik's avatar
Dweik
Brass Contributor
Jan 14, 2024

Why Microsoft Need send email from O365 not from SMTP gateway

Dear Experts, 

I have a question about O365 Mail flow, Microsoft want send email directly to internet and not trough SMTP gateway also configure DKIM, SPF, and MDRAC from O365 Side. 

 

Can someone help me Why it is required?

 

  • sharmaharsh's avatar
    sharmaharsh
    Copper Contributor
    Microsoft Office 365 (O365) provides its own email infrastructure, and there are several reasons why organizations may choose to send emails directly from O365 rather than through an external Simple Mail Transfer Protocol (SMTP) gateway. Here are some reasons:

    Integration and Management: Microsoft O365 is a comprehensive suite that includes email services. Sending emails directly from O365 allows for better integration and centralized management of email communication within the O365 environment. It simplifies administration and reduces the need for additional third-party tools.

    Security and Compliance: O365 has robust security features and compliance tools built into its email services. By sending emails directly from O365, organizations can leverage these built-in security measures, ensuring that emails are encrypted, protected against threats, and comply with industry regulations.

    Authentication and SPF Records: Sending emails from O365 ensures that emails are authenticated properly. O365 manages Sender Policy Framework (SPF) records, which help prevent email spoofing and phishing. This enhances the trustworthiness of emails sent from the O365 platform.
    • Dweik's avatar
      Dweik
      Brass Contributor
      The things I'm not using Microsoft Security for Example E5 or EOP P1 , P2
  • Dan_Snape's avatar
    Dan_Snape
    Steel Contributor
    I'm not sure what your question is about. Exchange Online is using very similar technology to Exchange on premises, so uses those transport services. Messages get routed wherever you want them to go depending on the outgoing connectors configured. If none are configured they go directly to the internet. It is supported to use a 3rd party gateway if you like, you just need to configure the message routing and authentication correctly.
    • Dweik's avatar
      Dweik
      Brass Contributor
      The question : need reason Why i need to send email directory to internet without pass to 3rd party gateway

      • Dan_Snape's avatar
        Dan_Snape
        Steel Contributor
        You still get anti-spam and anti-malware as well as message authentication if you decide not to use a 3rd party gateway. The question you need to be asking is "What will a 3rd party gateway give me that I don't get natively with Exchange Online?" Once you have the answers to that question you can decide on the mail routing

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