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Thread: Invalid SPF mechanism

  1. #1
    fsoares is offline Intermediate Member
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    Default Invalid SPF mechanism

    Hello,

    There is a user (using Outlook connector) sending e-mails outside of the company. All his messages are being blocked by a specific domain. Please, see message below:

    Received-SPF: PermError (amsdc1-s-02325.europe.shell.com: domain of
    <mailto:user@domain.org.br> user@domain.org.br used an invalid SPF
    mechanism)

    Any idea?

    Thanks!!

  2. #2
    dwill's Avatar
    dwill is offline Special Member
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    Default

    Seeing a bit more of the e-mail header may be helpful. It sounds like the SPF my be incorrectly trying to resolve
    user@domain.org.br
    instead of
    domain@org.br

    I would try sending from a different account just to rule out that the initial user is not blocked.
    Do you have an SPF record in your DNS?
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  3. #3
    fsoares is offline Intermediate Member
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    Default

    Hello Dwill,

    The SPF record is ok. We were used to send messages to this domain and suddenly it was blocked. To my surprise he sent the e-mail again and it was successfully received there.

    Thanks for your reply!!

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