Greylisting defers all emails from Office 365 accounts




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    Fouad Ahmed Fouad

    I didn't use Greylisting for this issue, it's not Outlook domains only what use many ip addresses, it's all major companies like Google and other major hosting companies.

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    Pavel Mikhaylov

    Hello, Fouad Ahmed Fouad,

    The article addresses a particular issue related to greylisting and Office 365 services.

    In case you are experiencing an issue with different symptoms and the information from our knowledge base does not help, please create a request to our Support team:

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    I do not get this solved:

    Apr 24 18:42:22 mail postfix/cleanup[9088]: 4CDAA102851: message-id=<>
    Apr 24 18:42:32 mail postfix/cleanup[9088]: 4CDAA102851: milter-reject: END-OF-MESSAGE from[]: 4.7.24 SPF validation defer.; from=<> to=<> proto=ESMTP helo=<>

    I think 40.107.*.* and all according domains should be whitelisted. 😫

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    Denis Bykov


    According to log message, mail was deferred during SPF validation. To avoid it, you can add '' to  SPF local rules as described here -

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