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Not having an SPF record is the same as having one with a ?all default. Essentially it means nothing, and thus should not be used as grounds for blocking.
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Not having an SPF record is the same as having one with a ?all default. Essentially it means nothing, and thus should not be used as grounds for blocking.

marcus

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Vasil<br />
<br />
Does enabling Hard Fail in EOP means that it will reject ALL incoming external emails if their SPF is tagged as hard fail?
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Vasil

Does enabling Hard Fail in EOP means that it will reject ALL incoming external emails if their SPF is tagged as hard fail?

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Not reject, mark as spam, and then perform whichever action you have configured for spam messages. Check the documentation here: <a href="https://docs.microsoft.com/en-us/office365/SecurityCompliance/advanced-spam-filtering-asf-options" rel="ugc">https://docs.microsoft.com/en-us/office365/SecurityCompliance/advanced-spam-filtering-asf-options</a>
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Not reject, mark as spam, and then perform whichever action you have configured for spam messages. Check the documentation here: https://docs.microsoft.com/en-us/office365/SecurityCompliance/advanced-spam-filtering-asf-options [https://docs.microsoft.com/en-us/office365/SecurityCompliance/advanced-spam-filtering-asf-options]

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I tried to extract the message header of a spam email that we are receiving in inbox and noticed that it doesn't have a SPF. My question is, is this suppose to be accepted even if it did not permit to send the email? Why is it not being blocked by EOP?<br />
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;received-spf &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;None (protection.outlook.com: daemon-domain.com does not designate permitted sender hosts)
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I tried to extract the message header of a spam email that we are receiving in inbox and noticed that it doesn't have a SPF. My question is, is this suppose to be accepted even if it did not permit to send the email? Why is it not being blocked by EOP?

	received-spf	None (protection.outlook.com: daemon-domain.com does not designate permitted sender hosts)

Received-spf: None

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