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  • Authors
  • Yunes Tarada
  • About
  • Latest Posts
Yunes Tarada
Domain & Email Security Expert at PowerDMARC
Yunes is an Operations Team Lead at PowerDMARC with expert knowledge in email authentication and security. Yunes is a Microsoft-certified Azure Administrator Associate with certifications in CompTIA A+ and many more.
Latest posts by Yunes Tarada (see all)
  • How to Split a DKIM Record - June 5, 2026
  • compauth=fail: Microsoft Composite Authentication Explained - June 1, 2026
  • Is Windows Defender Enough for Small Business Security? - May 14, 2026
How to fix 550 5.7 0 email rejected per SPF policy

How to Fix “550 5.7 0 Email Rejected Per SPF Policy”

Blog
“550 5.7 0 email rejected per SPF policy” is a common SPF error that occurs due to the absence of an SPF record in DNS
April 12, 2023
Microsoft now sending DMARC Reports for Enterprise Outlook users

Microsoft is Now Sending DMARC Reports for Enterprise Outlook Users

Blog
As per Microsoft’s update that rolled out on March 21, 2023,  reports on authentication and deliverability with DMARC can be received by all domain owners having their MX pointed to Office 365. This major update will allow domain owners…
March 21, 2023
The DNS record type 99 SPF Has Been Deprecated

How to Fix “The DNS record type 99 (SPF) Has Been Deprecated”?

Blog
You may have come across an SPF record warning “The DNS record type 99 (SPF) has been deprecated” because it was discontinued in 2014
March 9, 2023
How to Implement Mail Domain Authentication in Your Email Infrastructure

How to Implement Mail Domain Authentication in Your Email Infrastructure

Blog
Mail domain authentication ensures that the sender of the email is who they claim to be, and the recipient can trust the email.
February 22, 2023
How to Configure Single Sign On SSO with Microsoft Azure Active Directory

How to Configure Single Sign-On (SSO) with Microsoft Azure Active Directory?

Blog
Microsoft SSO is a user authentication process that allows you to operate multiple applications using a single account.
February 16, 2023
How to delegate a subdomain to another NameServer

How to delegate a subdomain to another NameServer?

Blog
In order to delegate a subdomain to another nameserver you need to identify the subdomain, create new zone file and NS record.
February 2, 2023
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