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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Free vs Paid Email Verification: When Is Free Enough?

The right question is not whether paid is always better. It is whether your use case actually needs more than a strong free first pass.

email-validationverify-listverify-email

How to Use MailCull: A Complete Walkthrough

A complete walkthrough of MailCull from signup to first cleaned list, including how to read the 20-code evidence chain on every verdict.

mailcullverify-listverify-email

Email Verification for Recruiters: Clean Your Candidate Database

Recruiting databases decay quickly, which makes list hygiene more operational than optional.

recruitingverify-listoutreach

How to Remove Duplicate Emails from Your List

Deduplication is simple, but it matters more than most teams expect once lists come from multiple sources.

list-cleaningcsvhygiene

How to Reduce Email Marketing Costs by Cleaning Your List

Why dead addresses make your ESP bill and campaign inefficiency worse than they need to be.

list-cleaningemail-marketingesp-costs

Email Verification for Restaurants and Local Businesses

Why local-business email data is usually messier than teams expect.

email-validationlocal-businessrestaurants

How to Clean Email Addresses Collected From Paper Forms

A practical cleanup workflow for event cards, signup sheets, and manually entered addresses.

list-cleaningeventsmanual-entry

How to Migrate Email Lists Between ESPs Without Losing Deliverability

ESP migration is one of the best moments to leave weak contacts behind instead of carrying them into the next system.

esp-migrationlist-cleaningdeliverability

How to Choose the Right Email Verification Tool

A simpler way to decide between free tools, paid tools, batch workflows, and real-time validation products.

email-validationtool-comparisonverify-list