MailCull blog: field notes on email deliverability and list quality
Email Cleaning vs Scrubbing vs Verification: Defining the Three Terms
Verification, scrubbing, cleaning: same neighborhood, different jobs. A definitions pillar.
The Best Free Email Verification Tools in 2026 (Honest Ranking)
Eight tools, real free-tier numbers, and where each one genuinely wins. The 'best' depends on what you're actually doing.
What Is a Catch-All Email Domain, and What Do You Do About It?
Catch-all behavior is the hardest case in email validation. Here is the honest one.
Can You Verify an Email Address Without Sending One?
Five check layers, in plain English, with the limits of each.
How to Validate Email Address Format
What email syntax really allows, why most regex is wrong, and where format checking stops.
How to Check if a Domain Is Catch-All
Why catch-all domains defeat naive verification, and how to detect them honestly.
How to Detect Disposable Email Addresses
Why disposable addresses fool naive validation, and how to catch them before they pollute your list.
How to Verify an Email Address
The few ways to verify an address, what each proves, and where to go deeper.
The AI read: a plain-English second opinion on every verdict
Every MailCull verdict is deterministic. But when you want the why in plain English, the AI read explains the same signals and tells you what to do next, without ever overriding the engine.
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