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AdamS550
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Joined Dec 04, 2023
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Re: Exchange Online Protection SPF record
we had the same issue all of sudden most of our emails was marked spam and when we contacted MS support they fallow the standard MS support spam filter, email policies ..etc even though we clearly told them it seems the emails that was send from IPV6 like 2603:10c6:10:e::17 it was marked as spam and this IP is belong MS. why is that? after 3 days of none sense and lost of emails we did our investigation https://www.spf-record.com/spf-lookup/spf.protection.outlook.com?ip=2603:10c6:10:e::17 IPV6 start with 2603: is not part of spf recorders that cause our email to fails SPF check further more the entire 2603:1000::/24 is belong to Microsoft network. since we added the ipv6 record to our spf record our email seems to be fine v=spf1 include:spf.protection.outlook.com ip6:2603:1000::/24 -all until MS figure out how to implement basic things like SPF 🙂15KViews1like0Comments
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