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.
Running into a 255-character limit when adding your DKIM record? Learn how to split a DKIM TXT record into multiple strings the right way — step-by-step, with examples for Route 53, Google Cloud DNS, and more.
compauth=fail in your email headers means Microsoft’s composite authentication rejected your message. Learn what it is, what each reason code means, and exactly how to fix it.
Windows Defender offers solid baseline protection, but is it enough for small businesses? Discover what it covers, where the gaps are, and what to add for complete security.
Learn what the "SOA serial number format is invalid" error means, what causes it, what the correct SOA serial number format is, and how to fix it step by step.
Learn how to send secure email in Gmail using Confidential Mode, S/MIME encryption, and best practices to protect sensitive messages in Google Workspace.