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.

2026

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Email Verification for SaaS: Clean Your User Database

When user emails go bad, your onboarding and lifecycle data get weaker too. Cleanup is part of product ops, not just marketing.

saasverify-listverify-email

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.

brevolist-cleaningverify-list

What Is a Catch-All Email Domain and Why Does It Matter?

Catch-all domains are one of the clearest examples of why email validation always has limits.

email-validationdeliverabilityb2b

CSV Email Checker: How to Validate Emails in a CSV File

How MailCull handles CSV-based email checking without forcing you to rebuild the file first.

csvverify-listlist-cleaning

Email Verification for Dental Practices and Medical Offices

Why appointment-driven businesses benefit from reviewing patient email data before big reminder cycles.

email-validationhealthcareclient-communication

Email Verification for Real Estate Agents: Keep Your Contact Database Clean

Open house lists, older client records, and referral data all decay faster than most teams expect.

real-estatelist-cleaningcrm

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.

constant-contactlist-cleaningverify-list

Email Validation for Shopify: Clean Your Customer List

A practical workflow for exporting Shopify contacts, reviewing them, and sending to a cleaner segment.

shopifylist-cleaningecommerce

How to Handle Unknown Email Validation Results

A practical framework for deciding what to do with addresses that land in the unknown bucket.

email-validationverify-listlist-cleaning