How to Read Email Headers to Verify SPF, DKIM & DMARC (Cold Email Guide)
Checking a DNS record tells you it's published correctly. Reading email headers tells you whether authentication actually worked on a real message, sent through your real sending stack, to a real inbox.
Timothy VaddeAug 18, 2026
SPF Lookup Limit: Why It Matters for Cold Email Deliverability
The SPF lookup limit cold email is one of the most common reasons a correctly formatted SPF record fails validation without any obvious error. If you're stacking multiple sending tools on one domain — which is normal for cold email delivera
Timothy VaddeAug 14, 2026
DMARC Policy: p=none vs p=quarantine vs p=reject Explained
Picking the wrong DMARC policy is one of the fastest ways to accidentally block your own legitimate email. The DMARC policy p=none vs reject decision (with quarantine sitting in between) determines exactly what happens to a message that fai
Timothy VaddeAug 14, 2026
Email Authentication Setup for Cold Email: What You Actually Need
There's a lot of noise around email authentication setup for cold email — some of it overly technical, some of it oversimplified to "just add SPF, and you're fine." Neither is accurate. This is a practical breakdown of what you actually nee
Timothy VaddeAug 13, 2026
How to Automate SPF, DKIM, and DMARC Setup
Manually publishing DNS records works fine for one domain. It stops working the moment you're managing five, twenty, or a hundred — which is exactly the volume most cold email operations run at.
Timothy VaddeAug 13, 2026
DMARC Record Setup Guide for Beginners
This DMARC record setup guide is written for anyone who already has SPF and DKIM in place but hasn't taken the final step of publishing a DMARC policy. That step matters more than most people realize — without it, receiving servers are left
Timothy VaddeAug 10, 2026
DKIM Setup for Google Workspace: A Beginner's Guide
DKIM setup for Google Workspace is one of those tasks that looks intimidating the first time because it involves generating a key pair, but the actual process inside the admin console only takes a few minutes once you know where to click. T
Timothy VaddeAug 1, 2026
How to Set Up an SPF Record (Step-by-Step)
Knowing how to set up an SPF record correctly is the first thing to get right in your email authentication stack — everything else, including DKIM and DMARC, assumes SPF is already in place. This walkthrough covers the exact steps, the synt
Timothy VaddeAug 1, 2026
The Founder's Guide to DKIM, SPF, and DMARC Setup
DKIM, SPF, DMARC setup guide to help founders
Timothy VaddeJul 29, 2026
Cold Email Agency Infrastructure: The Definitive Setup Guide 2026
The complete infrastructure setup guide for cold email agencies in 2026.
Timothy VaddeJul 28, 2026
What tools can help automate the setup of multiple email domains and mailboxes for outreach purposes?
This article explores tools for automating email domain and mailbox setup for outreach, comparing managed platforms and DIY stacks based on time, control, and cost. It offers a breakdown of tools like Icemail.ai, Zapmail.ai, and Google Work
Timothy VaddeJul 16, 2026
How do I integrate Google Workspace or Microsoft 365 mailboxes into my cold email campaigns?
Learn how to integrate Google Workspace or Microsoft 365 mailboxes into your cold email campaigns, focusing on proper domain setup, DNS authentication (SPF, DKIM, DMARC), and safe sending practices. This guide covers connecting mailboxes se
Timothy VaddeJul 16, 2026