MailCull blog: field notes on email deliverability and list quality
Email Verification and GDPR: What Is Lawful When You Clean a List
An email address is personal data. Verifying it is processing. Here is what that means.
How to Choose an Email Verification Service
Ignore the accuracy claims. Here is what actually separates these tools.
Stop Bad Email Addresses at the Signup Form
Cleaning is repair. This is prevention, and it costs less.
Why Are My Emails Bouncing? A Diagnostic Walkthrough
The bounce report has the answer. You just need to read the codes.
What Is a Disposable Email Address? (And Why They Distort Your List)
A disposable address isn't a fake address. It's a real one nobody's ever going to read.
What Actually Happens When You Send to an Invalid Email Address
One bad address doesn't just bounce. It nudges every subsequent send a little closer to the spam folder.
Role-Based Email Addresses: What They Are and When to Mail Them
A role-based address isn't automatically bad. It just behaves differently than a personal one, and the right call depends on what you're sending.
MX Record Validation: What It Actually Tells You About an Email Address
If the domain has no MX, no mail lands. But a healthy MX record proves less than people think. Here is where the signal stops being decisive.
How to Check if an Email Address Is Valid (Step by Step)
One address or ten thousand, the right method depends on what you're going to do with the answer.
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