Milter, LMTP, LDA and Virtual look like competing choices. They are not. The real dividing line in Postfix email architecture is the moment your server says 250 OK and accepts responsibility for a message.
Great processor, 12 GB RAM, 512 GB storage, 5G. My Xiaomi 14 Civi had everything - except the one thing that mattered once I landed in America. The same SIM worked instantly in a Google Pixel 9. Here’s why, and the 5-minute check that would have saved me.
China’s push to reduce dependence on foreign technology holds lessons for India. Not about banning Microsoft or AWS, but about building the capability to choose - through education, open source ecosystems, and entrepreneurship.
Why the conversation about education must move beyond blame towards building hope. Every crisis produces outrage. But outrage fades. What remains is the system we failed to fix.
A week ago, my club flag travelled with me from Bengaluru to the United States. This is an open letter to my Rotary family in America - about flags, friendships, and the ideas that emerge when Rotarians from different worlds sit down together.
The complete story of designing a licensing and backup encryption system for a product shipped to customer sites. Ed25519 digital signatures, dual-envelope AES-256-GCM encryption, SHA-256 key derivation, and the master key trust trade-off.
A few days ago, I was inducted into Rotary once again. For many, that may seem like the start of a new journey. For me, it feels more like coming home.
Filesystem encryption, database TDE, column-level encryption, S3 server-side vs client-side - what each layer actually protects, the gaps between them, and how to choose. Drawn from real customer conversations.
A practitioner’s walkthrough of encryption fundamentals - symmetric, asymmetric, hashing - with real algorithm comparisons, a decision framework, and common mistakes from two decades of building production systems.
For years, we built the factory. Pipelines, platforms, guardrails. Then something dangerous happened - the DevOps team decided to build a product of its own.