Email DeliverabilityUpdated 5 min read
Open rates: moving to more reliable metrics
You must look beyond open rates and use more reliable metrics to improve your email campaign's ROI. Find out what metrics you should be using.
Inbox Thinking
The Alterable blog on email deliverability, personalization, and design. For marketers who want to understand the inbox, not just use it.
Setting something up?
Step-by-step guides for Klaviyo, Mailchimp, HubSpot and more.
Checking an email?
Page 8 of 8 · 78 articles, newest first
Email DeliverabilityUpdated 6 min read
Email authentication: SPF, DKIM and DMARC, and what Gmail, Yahoo and Outlook now require
What SPF, DKIM and DMARC each prove, how they fit together, and the sender requirements Gmail and Yahoo enforced in 2024 and Microsoft in 2025: DMARC, alignment, one-click unsubscribe and a 0.3% spam ceiling.
Email DeliverabilityUpdated 6 min read
List bombing: what it is and how to protect your email signup forms
List bombing turns your signup form into a weapon against someone else's inbox, and your sender reputation pays for it. What it looks like, how to protect the form, and what to do mid-attack.
Email DeliverabilityUpdated 12 min read
Your email sender reputation: a practical guide to getting (and staying) in the inbox
Maximize the impact of your emails with a strong sender reputation. Discover practical steps for improving your email sender reputation.
Email DesignUpdated 6 min read
MJML in 2026: what it's still good for, and where it gets in the way
MJML compiles simple markup into bulletproof email HTML. Ten years on, here's what it still does better than anything else, where it fights you, and how to put dynamic content inside it.
Email DesignUpdated 5 min read
Create a personalized image for your email campaign
Create personalized images with Alterable: our technology allows you to increase engagement and retention.
Email MarketingUpdated 4 min read
Email is ubiquitous and here to stay
Alterable (adjective. capable of being altered) was born to put real-time content personalization inside emails