#DKIM
14 related articles
·3 min
SPF, DKIM, and DMARC Explained: A Complete Guide to Email Authentication Configuration
A detailed guide to SPF, DKIM, and DMARC email authentication mechanisms—covering how they work, configuration methods, and how they complement each other to improve deliverability and prevent phishing.
Read more →
·3 min
Hackers Disguise as ClaudeBot for Mass Vulnerability Scanning: Identification and Defense Guide
Attackers impersonate ClaudeBot and other AI crawlers for mass vulnerability scanning using User-Agent spoofing. Learn attack methods, identification techniques, and defenses including IP verification and WAF configuration.
Read more →
·2 min
DNS Sale Record Proposal: Declaring Domain For-Sale Status via TXT Records
A new proposal suggests declaring domain for-sale status via DNS TXT records, enabling machine-readable domain trade information. This article analyzes its technical implementation, market impact, and risks.
Read more →
·3 min
Stynar: How an Autonomous AI Sales Agent is Reimagining the Entire B2B Outbound Prospecting Workflow
Deep dive into Stynar, an AI SDR product that uses autonomous AI agents for prospect research, personalized emails, multi-mailbox sending, intent detection, and automated meeting booking to cut B2B outbound costs.
Read more →
·2 min
The Privacy Trap of Noreply Emails: No Reply Doesn't Mean No One's Watching
Exposing the privacy risks behind noreply mailboxes: users unknowingly send IDs, passwords, and sensitive data to unmonitored inboxes. Learn how to protect yourself.
Read more →
·3 min
DANE/TLSA Record Mismatch Causing Silent Email Loss: From Packet Capture Troubleshooting to Root Cause Resolution
A real-world case study of silent email loss caused by DANE/TLSA record mismatch. From empty logs to tcpdump packet capture revealing TLS handshake failures, with TLSA update procedures and automation strategies.
Read more →
·3 min
13 Years After DMARC: Why 68.4% of Domains Still Don't Enforce Email Authentication
13 years after DMARC's release, 68.4% of domains still haven't set policies to quarantine or reject. This article analyzes DMARC deployment status, why adoption is slow, and the path from p=none to p=reject.
Read more →
·3 min
How to Assemble a Modern Email System with Off-the-Shelf Components: A Modular Architecture Guide
Learn how to assemble a modern email system using off-the-shelf services like Postmark, SendGrid, and Amazon SES, covering sending, receiving, authentication, and trade-offs around vendor lock-in and cost.
Read more →
Reverse Spam Filtering: Making Senders…
·2 min
Reverse Spam Filtering: Making Senders Earn Their Way Into Your Inbox
A radical rethink of spam filtering: using proof-of-work to make unknown senders pay a computational cost, fundamentally disrupting the spam economy. Deep dive into the technical principles, real-world challenges, and lessons learned.
Read more →
·6 min
OraAgent Hands-On Review: End-to-End Automation of Foreign Trade Prospecting Emails — From Finding Customers to Sending Emails in One Click
A hands-on review of how OraAgent (AI assistant Aura) automates the entire foreign trade prospecting email workflow: auto-searching customers, prioritizing quality leads, batch-generating personalized emails, and one-click sending to cut acquisition costs.
Read more →
Why DMARC's NP Tag Conflicts with DNSSEC
·3 min
Why DMARC's NP Tag Conflicts with DNSSEC
DMARC's np tag defends against non-existent subdomain spoofing, but may conflict with DNSSEC's denial-of-existence mechanism. Learn the root cause, real-world impact, and mitigation strategies.
Read more →
Tutorials·2 min
Claude Code DevOps in Practice: Linux VPS Deployment and Infrastructure Automation
A detailed guide on Claude Code for DevOps: Linux VPS secure deployment, permission isolation, Shell automation workflows, and full-stack production deployment from DNS to NGINX and HTTPS.
Read more →
Product Reviews·3 min
Deep Dive into Mocha AI App Builder: Deploy a Full-Stack Website with a Single Prompt
Deep dive into Mocha AI app building platform with built-in database, auth, email, domain binding, and analytics. Deploy production-grade websites with a single prompt.
Read more →
Deep Dives·4 min
Context Engineering Explained: The AI Paradigm Shift from Prompt to Context Engineering
Deep dive into Context Engineering: its core principles and practices. From Prompt Engineering to context design, orchestration, and optimization—exploring how Karpathy's new AI paradigm reshapes LLM app development and AI Agent construction.
Read more →