Email Deliverability Blog

Guides, analysis, and practical tips for senders who want to reach the inbox — not the spam folder.

Guide

What Is a Catch-all Domain — and Should You Email It?

Catch-all domains accept email for any address, making standard SMTP verification useless. Here's how to handle them intelligently and recover the 20–40% of B2B lists that fall into this category.

Coming soon

Technical

SPF, DKIM, DMARC: The Complete Setup Guide for Cold Email Senders

Authentication is no longer optional. Gmail and Yahoo require it. This guide covers every record you need, common mistakes, and how to verify your setup is correct.

Coming soon

Best Practice

How Often Should You Re-verify Your Email List?

Email addresses decay at 2–3% per month. That means a 10,000-contact list has 600–900 new invalid addresses every 90 days. Here's a re-verification schedule that keeps bounce rates under 1%.

Coming soon

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