Insights · deliverability · how-tos

MailoClean Blog

Practical guides on email verification, sender reputation, and keeping your lists clean. Written by the MailoClean team.

All posts Comparisons Developer resources Email deliverability How-to guides Tips & tactics

Developer resources

Featured Developer resources

Email headers explained: how filters decide where you land

Email headers are the hidden text at the top of every message. Spam filters read them carefully. Here is what each one means.

AD Admin · Jun 21, 2026 · 3 min read

Developer resources

Developer resources 3 min read

DMARC monitoring: set up reports without breaking anything

DMARC enforcement breaks email when set up too fast. Here is the staged rollout that protects your domain without breaking legitimate senders.

AD Admin

Jun 20, 2026

Developer resources

Developer resources 3 min read

SMTP protocol explained (for people who do not write code)

SMTP runs your email. Understanding it makes deliverability decisions clearer. Here is the protocol in plain English, no code required.

AD Admin

Jun 19, 2026

How-to guides

How-to guides 3 min read

How to keep a newsletter list clean (without losing subscribers)

Newsletter senders face a hard choice: clean aggressively and lose readers, or do nothing and lose deliverability. Here is the middle path.

AD Admin

Jun 18, 2026

Tips & tactics

Tips & tactics 3 min read

The 50 most common email typos (and how to auto-correct them)

gmial.com, hotmial.com, yhaoo.com. The same fifty typos cost senders billions every year. Here is the list and the fix.

AD Admin

Jun 17, 2026

Email deliverability

Email deliverability 3 min read

GDPR and email verification: what you need to know

Email verification is GDPR-compliant when handled correctly. Here is the legal framework, what to document, and how to choose a compliant vendor.

AD Admin

Jun 16, 2026

How-to guides

How-to guides 3 min read

Email verification for recruiting: keep your candidate outreach delivering

Recruiters have the worst bounce rates in any industry. Here is the verification playbook that keeps candidate outreach delivering.

AD Admin

Jun 15, 2026

Tips & tactics

Tips & tactics 3 min read

B2B cold email: why list quality beats list size every time

A list of 1,000 verified prospects will outperform 50,000 scraped ones every time. Here is the math and the playbook.

AD Admin

Jun 14, 2026

How-to guides

How-to guides 3 min read

Email verification at ecommerce checkout: catch the typos that cost you

Up to 8% of ecommerce orders have an email typo. The customer never gets the receipt and assumes you scammed them. Here is the simple fix.

AD Admin

Jun 13, 2026

Try the engine

Ready to clean a list?

Run a free verification on the homepage, or create an account to upload bulk CSVs.

Try free verifier Create account