MailCull blog: field notes on email deliverability and list quality

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.

July 2, 20266 minemail-validation

Can You Verify an Email Address Without Sending One?

Five check layers, in plain English, with the limits of each.

June 29, 20268 minverify-email

How to Clean an Email List in Omnisend

A complete Omnisend list-cleaning workflow for ecommerce brands: covering what verification covers, how to handle results, and when to do it.

June 26, 20265 minomnisend

How to Check if Your Domain or IP Is on an Email Blacklist

How DNS blacklists work, which ones matter, and how to check and get off them.

June 24, 20262 mindeliverability

How to Clean Your MailerLite Email List

A MailerLite-specific verification workflow, including the one thing most guides miss about MailerLite's import review process.

June 23, 20264 minmailerlite

How to Validate Email Address Format

What email syntax really allows, why most regex is wrong, and where format checking stops.

June 23, 20262 minemail-validation

How to Check Email Deliverability for a Domain

The five signals that decide whether your mail lands, and how to check them in one pass.

June 22, 20262 mindeliverability

How to Check if a Domain Is Catch-All

Why catch-all domains defeat naive verification, and how to detect them honestly.

June 21, 20262 minemail-validation

How to Clean Your Email List in Mailchimp

The complete Mailchimp list-cleaning workflow: what to verify, why SMTP probing matters, and how to act on the results.

June 20, 20265 minmailchimp