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Short guides on the parts of business email nobody explains: DNS records, spam placement, and what your options actually cost. No fluff, no whitepapers, just what you'd learn the hard way.
What each record actually does, how the three chain together into real spoofing protection, and how to set all of them up on your domain in under an hour.
/learn/spf-dkim-dmarc-explained
Deliverability→The ten causes behind spam placement, from DNS to reputation to engagement, each with a concrete fix, ordered by how often they're the culprit.
/learn/why-emails-land-in-spam
Choosing a provider→What Workspace is great at, where it quietly costs you, and how the real alternatives (Microsoft 365, Zoho, Proton, fastmail, self-hosting) compare on price and hassle.
/learn/google-workspace-alternatives
Authentication→p=none, quarantine, reject — what each policy does to failing mail, how rua reports reveal who sends as you, and a safe rollout to enforcement.
/learn/dmarc-explained
Original data→We ran dig across the Tranco top 5,000 — SPF 75.1%, DMARC 68.5% (51.8% at p=reject), MTA-STS 2.8%. Full methodology, tables, and findings.
/learn/email-auth-census-2026
Reference→SPF, DKIM, MX, DMARC, MTA-STS, TLS-RPT, BIMI — what each record does, what receivers check, and how the whole chain fits together.
/learn/email-dns-records-guide
Deliverability→The fundamentals that decide whether cold email lands — authentication, warm domains, volume discipline, list quality — and the myths to ignore.
/learn/cold-email-deliverability
Deliverability→Why new and dormant senders start in spam, what warmup actually consists of, and a safe week-by-week ramp with real engagement.
/learn/email-warmup-explained
Infrastructure→When a dedicated IP is worth operating and when a well-managed shared pool is the better engineering choice — no FUD, just trade-offs.
/learn/dedicated-vs-shared-ip
Email security→How the DNS record and HTTPS policy file force TLS for inbound mail, why it stops downgrade attacks, and how to deploy it with TLS-RPT.
/learn/what-is-mta-sts
Deliverability→Identify which list matters, fix the actual cause behind the listing, request delisting the right way, and monitor so it never recurs.
/learn/blacklist-removal
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