Guides
Fixes for the errors that actually show up in support tickets — written by someone who has worked them, with the exact commands to confirm each diagnosis and the tool to verify the fix.
DNS Tools
What actually controls propagation time — TTLs, resolver caches, and registrar delays.
A checklist for records that refuse to update: caching, wrong zone, and stale nameservers.
The TTL-lowering timeline that makes DNS cutovers near-instant.
Telling a broken zone apart from a name that simply does not exist.
When to point with an alias and when to use a direct IP.
What this Chrome error means and how to fix it on your site or your device.
Where TXT records live in the Cloudflare dashboard, with proxy pitfalls.
Advanced DNS steps, host field gotchas, and verification.
Adding and verifying TXT records in GoDaddy DNS management.
Email Deliverability Tools
The current single-MX setup, verified, with per-registrar steps.
How mail servers choose between MX records, and common priority mistakes.
The diagnostic order that finds what a nameserver change broke.
Why SPF breaks at 10 lookups and how to flatten your record safely.
Exactly what to publish, what not to add, and how to verify it.
What each qualifier does at real mailbox providers in the DMARC era.
The authentication failures behind this rejection and the records that clear it.
Gmail now requires SPF or DKIM alignment. Here is the exact remediation.
A safe starter DMARC record and where to put it.
Why p=none triggers this warning and when to move to quarantine.
A staged rollout plan that will not eat your legitimate mail.
Headers, provider defaults, and brute-force discovery — three ways to find it.
What modifies a message in transit and how to stop it breaking DKIM.
Enabling both selectors and publishing the CNAMEs correctly.
The exact host name and value fields for _dmarc on Cloudflare.
Using the Zone Editor to publish DMARC on shared hosting.
Testing outbound and inbound port 25, and your options when it is filtered.
Submission, relay, and implicit TLS — the right port for each job.