Outlook will not successfully send a message

Thistle Quilt Guild 0 Reputation points
2026-10-13T21:03:48.4366667+00:00

I receive this message even when sending a one word message to myself at another account.

Remote server returned '554 5.7.0 < #5.7.520 smtp;550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)>'

What would cause this and how do I fix it?

Outlook | MacOS | Legacy Outlook for Mac | For home
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  1. Manoel Barros 22,250 Reputation points Independent Advisor
    2026-10-13T23:24:34.0133333+00:00

    Hi!

    Please answer the questions below:

    1. Is your email personal, corporate, or educational?
    2. Is your email from a custom domain (@yourname.com, @companyname.com), Microsoft (@outlook.com or @hotmail.com), Google (@gmail.com), or a third-party domain?
    3. Do you have a Microsoft 365 subscription or a perpetual Office license?

    It is important to note that support for Legacy Outlook ended this month. Microsoft recommends migrating to the modern version, the New Outlook.

    https://support.microsoft.com/en-us/outlook/end-of-support-for-legacy-outlook-for-mac

    New Outlook

    https://apps.apple.com/us/app/microsoft-outlook/id951937596

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