THE LAB NOTES

Website and email troubleshooting guides

Start with the observation. Understand its limits. Verify the next step.

SPF lookup limit: why readable syntax can still fail

Understand the recursive SPF lookup limit and what a static SPF report cannot verify.

Find the correct DMARC record location and start monitoring before enforcing a policy.

Understand a weakened Content Security Policy and plan a tested change to inline script allowances.

Diagnose repeated brand names in HTML page titles and improve titles without treating character counts as ranking rules.

Understand why multiple SPF TXT policies cause errors, distinguish split strings from separate records, and plan a safe correction.

Diagnose server redirect loops involving HTTPS, www, CDNs or origin rules, and verify the final URL after correcting the conflict.

Find your site's real sitemap location, distinguish a missing default path from a broken sitemap, and verify discovery in Search Console.