Field notes · ~1 post / week

Writing about sending, deliverability, and the rules providers actually enforce.

Practical guides, post-mortems from real sends, and plain-English explanations of why your list quality is doing what it is doing. No fluff, no AI slop, no gated PDFs — just our working notes.

2026

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Email Validation Explained: What It Means and Why You Need It

A straightforward explanation of email validation and the checks that make it useful.

email-validationdeliverabilityverify-email

Best Free Email Verification Tools in 2026

A grounded look at what “free” usually means in email verification, and where MailCull fits.

email-validationcomparisonslist-cleaning

What Is MX Record Validation and Why Does It Matter?

MX validation is one of the clearest ways to tell whether a domain appears set up to receive mail.

email-validationdeliverabilitymx

Email Verification Checks Explained: What Each Layer Actually Does

A plain-language guide to the check layers used in modern email verification — from surface syntax to deep SMTP and Microsoft 365 HTTP enumeration.

email-validationcomparisonsverify-email