this post was submitted on 18 Aug 2023
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SPF record containing domain's own IP block (zerobytes.monster)
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The original was posted on /r/sysadmin by /u/MekanicalPirate on 2023-08-17 21:01:53+00:00.

Looking for some confirmation I'm thinking about this correctly.

If we are using Exchange Online for email delivery and already have include:spf.protection.outlook.com as a lookup, we don't need our own IP block as an ip4 lookup because emails will never be sourced from on-prem due to the use of Exchange Online.

Is that correct?

TIA,

MP

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