MailCull blog: field notes on email deliverability and list quality
Re-Engagement Campaigns: Winning Back Inactive Subscribers Without Wrecking Deliverability
You are about to mail the riskiest segment you own. Do it in this order.
You Inherited a Purchased Email List. Now What?
Verification tells you the addresses work. It cannot tell you that you may mail them.
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.
Email List Decay: How Fast Your List Rots and What to Do About It
Roughly 2% a month, but the range is wide and the drivers are predictable.
Bulk Sender Requirements in 2026: What Gmail, Yahoo and Microsoft Now Enforce
The 0.3% spam ceiling is the rule everyone quotes. The list-hygiene requirement is the one that catches people.
The Real Cost of a Dirty Email List (With the Actual Math)
Four costs, three of them invisible. Here is the arithmetic.
Why Are My Emails Bouncing? A Diagnostic Walkthrough
The bounce report has the answer. You just need to read the codes.
One practical deliverability note in your inbox each week.
Short, plain-English breakdowns of one real situation per send. Unsubscribe anytime. No tracking pixels.