Yunes Tarada - PowerDMARC

You may have come across an SPF record warning “The DNS record type 99 (SPF) has been deprecated” because it was discontinued in 2014

Mail domain authentication ensures that the sender of the email is who they claim to be, and the recipient can trust the email.

Microsoft SSO is a user authentication process that allows you to operate multiple applications using a single account.

In order to delegate a subdomain to another nameserver you need to identify the subdomain, create new zone file and NS record.

This blog broadly speaks about the SPF syntax table, SPF mechanism, SPF qualifier, and SPF modifier

Microsoft Office 365 DKIM selector2 not working is a common error that can be quickly resolved by following the given instructions.