SPF, DKIM & DMARC: The Complete Guide for 2025
Email authentication isn't optional anymore. Google and Yahoo now require SPF, DKIM, and DMARC for bulk senders. Here's how to set them up correctly.
Expert Email Intelligence
In-depth guides, honest tool reviews, and proven strategies to master deliverability, design, and growth.
Forget what you know about modern web development. Email HTML is a different world. Here are the structural patterns that actually work.
Your welcome sequence is the highest-ROI email automation you'll ever build. Here's a battle-tested 7-email framework that works across industries.
Email authentication isn't optional anymore. Google and Yahoo now require SPF, DKIM, and DMARC for bulk senders. Here's how to set them up correctly.
Sending from a new IP without warming up is like showing up to a job interview in pyjamas. Here's how to build sender reputation the right way.
Email Platform
The modern email platform for developers and marketers.
Free tier available — Paid from $29/mo
Email Platform
The email marketing veteran with a massive feature set.
Free tier available — Paid from $13/mo
Email API
Email API built for developers. Simple, fast, and reliable.
Free tier (100 emails/day) — Paid from $20/mo
Email Platform
Scalable email delivery and marketing from Twilio.
Free tier (100 emails/day) — Paid from $19.95/mo
Get our weekly digest of deliverability tips, design patterns, and strategy insights. No spam — we know better.