deliverability
14 articles
Double Opt-In vs Single Opt-In: Which Should You Use?
Double opt-in confirms every new subscriber before they join your list; single opt-in adds them instantly. Here's the deliverability and growth tradeoff.
Gmail Deleted Your Reputation Score: A Postmaster Tools v2 Playbook
Gmail removed Domain and IP Reputation from Postmaster Tools in 2026. Here is how to diagnose deliverability problems using Compliance Status and your own data.
How to Build an Email Preference Center That Cuts Unsubscribes
Most unsubscribes are a frequency problem, not a content problem. Here is how to build an email preference center that keeps subscribers instead of losing them.
How to Warm Up a New Sending Domain Without Getting Filtered
A new domain has no reputation, and mailbox providers treat that as suspicious. Here is a four-week warm-up schedule, the numbers to watch, and the traps.
BIMI in 2026: How to Get Your Logo Next to Your Emails
A step-by-step BIMI setup guide for 2026: DMARC enforcement, the SVG logo spec, VMC vs CMC certificates, real costs, and where logos actually display.
Email Blocklists: How to Check If You're Listed and Get Removed
Your open rate collapsed overnight. Here is how to check whether your domain or IP is on Spamhaus or Barracuda, get delisted, and stop it happening again.
Mailjet vs SendGrid: Which Email API Wins in 2026?
Mailjet vs SendGrid compared for 2026: pricing, deliverability, marketing features, and Mailjet's restructured plans. See which email service fits your stack.
SPF, DKIM and DMARC in 2026: Gmail, Yahoo and Outlook Setup Guide
Set up SPF, DKIM and DMARC for the Gmail, Yahoo and Outlook sender rules, with exact DNS records and what the new DMARC standard (RFC 9989) changes.
Postmark vs SendGrid: Which Transactional Email API in 2026?
Postmark vs SendGrid compared for 2026: pricing, deliverability, API design, and the Twilio merge. See which transactional email service fits your app.
Email Tracking Pixels and EU Regulators: The 2026 Rules Explained
France's CNIL and Italy's Garante issued 2026 rules on email tracking pixels. France's transition ended July 14; Italy's ends in late October.
Gmail AI Inbox: How It Affects Your Email Marketing
What Gmail's Gemini features actually do in 2026, who gets them, and what Google has not said about ranking marketing email. Practical steps for senders.
How to Clean Your Email List (And Why It Matters)
A step-by-step guide to removing bad addresses, re-engaging inactive subscribers, and protecting your sender reputation before it costs you.
Best Transactional Email Services Compared
Compare the best transactional email services for developers. API design, deliverability, templates, webhooks, and current pricing.
Email Deliverability: What It Is & How to Improve It
Understand what affects email deliverability and learn proven strategies to reach the inbox. Covers authentication, list hygiene, content, and the best tools.