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Notes on email, written by people who clean it for a living.

Deliverability deep-dives, product updates, and honest reviews of every tool in the email verification space. New articles weekly.

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ComparisonsFeatured

Constant Contact vs HubSpot (vs mailfloss): Which Email Marketing Stack Fits Your Business in 2026?

Compare Constant Contact vs HubSpot for email marketing in 2026 — and see why mailfloss keeps both performing at their best.

mailfloss team

Jul 29, 2026 · 3 min read

#comparisons  #verification  #deliverability

286 articles

security & compliance/

Security & Compliance

Email Security Auditing: Annual Checklist

Run a thorough annual email security audit: review SPF, DKIM, and DMARC, access controls, and incident response with this step-by-step checklist for teams.

mailfloss team · Jul 22, 2026 · 3 min read

security & compliance/

Security & Compliance

Email Fraud Prevention: Protecting Your Business

Stop email fraud before it costs you: learn to spot BEC, phishing, and spoofing, harden SPF, DKIM, and DMARC, and train your team to keep your business safe.

mailfloss team · Jul 15, 2026 · 3 min read

security & compliance/

Security & Compliance

Email Header Analysis: Detecting Suspicious Activity

Learn how to read email headers to verify the sender, trace a message's route, and check SPF, DKIM, and DMARC results so you can catch phishing and spoofing fast.

mailfloss team · Jul 6, 2026 · 3 min read

security & compliance/

Security & Compliance

Brand Protection Through Email Authentication

Email brand protection in four layers — SPF, DKIM, DMARC, and BIMI. Stop domain spoofing, block brand phishing, and show your verified logo in the inbox.

mailfloss team · Jun 28, 2026 · 3 min read

email marketing/

Email Marketing

Email Domain Security: Protecting Your Reputation

Protect your sender reputation from spoofing and phishing. This guide covers SPF, DKIM, DMARC, BIMI, MTA-STS, and ongoing domain health checks.

mailfloss team · Jun 12, 2026 · 3 min read

email marketing/

Email Marketing

Email Phishing Protection: Detection & Prevention

Email phishing protection requires layered defenses. Learn how to detect attacks, deploy authentication, train employees, and respond to incidents fast.

mailfloss team · Jun 10, 2026 · 3 min read