Articles tagged #email
Email & deliverabilitySep 28, 2026 · 7 min read
SPF and DMARC across the top 10,000 domains: 2026 data
We ran our SPF and DMARC checkers over the 10,000 most popular domains. Only 55.7% of those that accept mail are fully protected.
Domains & DNSSep 14, 2026 · 5 min read
Reverse DNS explained: PTR records and why mail servers need them
Reverse DNS maps an IP address back to a hostname using PTR records. Here's how it works, why mail servers check it, and how to set it up.
Email & deliverabilitySep 11, 2026 · 5 min read
SPF record too many lookups: how to fix the 10-lookup limit
Your SPF record fails with "too many DNS lookups" once it exceeds 10 mechanism lookups — here's why it happens and how to flatten or consolidate it safely.
Email & deliverabilityAug 26, 2026 · 5 min read
Why your emails go to spam (and how to fix it)
Emails land in spam because of broken authentication, poor sender reputation, or content that trips filters — here's how to diagnose and fix each one.
Email & deliverabilityAug 19, 2026 · 7 min read
MX record not working: how to diagnose and fix broken mail routing
A step-by-step guide to diagnosing why your MX record isn't routing mail, covering priorities, trailing dots, CNAME targets and stale records.
Email & deliverabilityAug 5, 2026 · 5 min read
DMARC policy: none, quarantine or reject — which should you use?
A practical guide to choosing p=none, quarantine or reject in your DMARC record, and how to move to full enforcement without breaking legitimate mail.
Email & deliverabilityJul 15, 2026 · 5 min read
How to create a secure SPF record
Learn how to write an SPF record that actually stops spoofing, without tripping the 10-lookup limit that breaks most real-world setups.
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