About Meysam Azad
Senior Site Reliability Engineer
Hell, and welcome to my profile 👋
I am a Senior Site Reliability with 7+ years of experience managing production workloads using automation and orchestration.
I write technical content on the Developer Friendly Blog using the knowledge and expertise I've gathered over the years.
I provide deep-dive tutorials and blog posts that help hundreds of professionals improve their system administration skills and become better engineers.
I have learned much managing production systems, and I share the following topics, among many, on the blog:
- Kubernetes ☸️
- Linux 🐧
- GitOps 🔃
- Ansible 🅰️
- Terraform 🔨
- Cloud Providers, e.g., AWS, Azure, etc. ☁️
Recent supporters
Posts
"We monitor nine protocols, they monitor three." It's a common DMARC-vendor claim. Here's how to read it. Protocol count is real, but it isn't the same as value. Of the six we measured across 5.5M domains, three carry almost all the weight — SPF, DKIM, DMARC — and the advanced layers are rare: MTA-STS at 0.3%, BIMI at 0.4%, DANE at 30 domains total (Feb 2026). A protocol almost nobody runs is ...
DMARC enforcement
Sep 05, 2026
2 views
MTA-STS is two files that have to agree. When senders report "STSFetchResult.None," one of them is missing. MTA-STS (RFC 8461) tells sending servers to require TLS when they deliver to you. It lives in two places: 1. A DNS TXT record at _mta-sts. — v=STSv1; id=20260826T120000. The id is just a version stamp. 2. A policy file served over HTTPS at mta-sts. /.well-known/mta-sts.txt. The policy file...
What is MTA-STS?
Sep 04, 2026
5 views
A mechanism the SPF spec told you to stop using twelve years ago is still in 41,728 records. When we parsed SPF across 5.5M domains (SPF Supply Chain 2026, scanned March 2026), 41,728 of them — 1.4% of all SPF-enabled domains — still include the ptr mechanism. RFC 7208 §5.5 is blunt: ptr "SHOULD NOT be used." Here's why the spec gave up on it. ptr authorizes a sender by doing a reverse-DNS lo...
What is ptr in SPF record and why you should NOT use it?
Sep 03, 2026
15 views