Using MxToolbox to setup SPF, DKIM and DMARC
https://blog.mxtoolbox.com/2019/11/07/using-mxtoolbox-to-setup-spf-dkim-and-dmarc/
WebNov 7, 2019 · Their blog, MxToolbox: How to Enable SPF, DMARC, and DKIM, is a great guide for setting up SPF, DKIM and DMARC in a single outbound email sender Office 365 configuration. If you’re getting started with SPF, DKIM and DMARC, this is a great guide to using our free tools and improving your Office 365 configuration for better email delivery.
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