NetworkTools: 39 DNS, email and domain tools that run without an accountIf you work with DNS records, email deliverability or domain health, you probably keep a handful of different lookup sites bookmarked. I built NetworkTools to put those everyday checks in one place, w9h ago · 2 min readthenetworktools.hashnode.dev
How to debug SPF, DKIM and DMARC failures: a step-by-step checklistEmail that lands in spam, or bounces with "550 5.7.26 unauthenticated sender", is almost always an authentication problem. SPF, DKIM and DMARC are three separate checks, and each one fails in its own Oct 22 · 4 min readthenetworktools.hashnode.dev