MailCull blog: field notes on email deliverability and list quality
How to Check MX Records for a Domain
What MX records are, how to read them, and what their absence tells you about an address.
How to Verify an Email Address
The few ways to verify an address, what each proves, and where to go deeper.
How to Clean Your Drip Email List
A practical Drip list-cleaning workflow: SMTP verification, the ecommerce billing angle, and what to do with the results.
How to Clean an Email List in ConvertKit (Kit)
For creators and newsletter operators, the list is the channel. Here is how to verify it properly.
How to Clean Your Constant Contact Email List
Constant Contact has strict bounce and engagement thresholds. Cleaning before the send protects your account and improves results.
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.
How to Import a Clean Email List Into Brevo (Sendinblue)
Cleaning before import is smarter than discovering problems after the send. Here is the full Brevo workflow.
How to Export and Clean Your ActiveCampaign Email List
A complete ActiveCampaign list-cleaning workflow: what to verify, when to do it, and how to act on the results.
Apollo Email Verifier: Pre-Send Cleaning for Outbound Lists
Why Apollo's built-in verification isn't enough for cold outreach, what proper SMTP verification covers, and a workflow for cleaning Apollo exports before sending.
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