MC
MailCull
Cull bad emails from any list — or check one.
Field notes · ~1 post / week

Writing about sending, deliverability, and the rules providers actually enforce.

Practical guides, post-mortems from real sends, and plain-English explanations of why your list quality is doing what it is doing. No fluff, no AI slop, no gated PDFs — just our working notes.

All posts list-cleaningdeliverabilityverify-listemail-validationbounce-rateverify-emailemail-marketingevidence-chain 80 posts · tag: list-cleaning

2026

Newest first · 9 of 80 shown
Apr 28
2026

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.
apollocold-outreachlist-cleaning
6 minRead →
Apr 28
2026

Email Verification in Clay: Adding the Receipts to Enrichment

Clay gives you enriched email data. MailCull gives you the receipt. Here's how to add SMTP verification to your Clay workflow.
claycold-outreachlist-cleaning
6 minRead →
Apr 28
2026

Instantly Email Verifier: How to Clean Lists Without Per-Email Costs

How to verify email lists before importing into Instantly — the full check stack, inbox rotation implications, and a step-by-step workflow.
instantlycold-outreachlist-cleaning
6 minRead →
Apr 28
2026

Email Verification for lemlist: A Workflow Guide

A complete verification workflow for lemlist users — what SMTP and M365 checks cover, how to handle risky addresses in an agency context, and the step-by-step process.
lemlistcold-outreachlist-cleaning
7 minRead →
Apr 28
2026

Email Verifier for Smartlead Users: Clean Lists Before Import

How to verify email lists before importing into Smartlead — what the tool checks, why built-in validation isn't enough, and a step-by-step workflow.
smartleadcold-outreachlist-cleaning
7 minRead →
Apr 13
2026

Email List Cleaning for E-Commerce: Protect Your Campaigns and Save on ESP Costs

For ecommerce teams, list hygiene is not just a technical task. It directly affects campaign reach, cost, and revenue confidence.
ecommercelist-cleaningdeliverability
1 minRead →
Apr 13
2026

Why Purchased Email Lists Are a Bad Idea

A practical look at why bought lists damage deliverability and why organic growth beats shortcuts.
deliverabilitylist-cleaningemail-marketing
2 minRead →
Apr 12
2026

How to Clean Your Email List in Klaviyo

A complete Klaviyo list-cleaning workflow — what verification actually covers, how to handle results, and when to do it.
klaviyoecommercelist-cleaning
4 minRead →
Apr 12
2026

What Is an Email Blacklist and How to Check if You're on One

Blacklists are not random punishment. They are usually a symptom of sending behavior that looked risky enough to trigger filtering systems.
deliverabilityblacklistssender-reputation
1 minRead →