Validity’s Heatwave Blocklist: What We Know So Far About Its Impact on Email Deliverability
The Validity Heatwave blocklist launched on September 3, 2026, to identify sending domains associated with synthetic reputation warming…
Product Updates
What’s new at Warmy: Features, fixes, and deliverability news
Google Postmaster Retired Domain Reputation. Warmy Is Building Its Own
For years, the Domain Reputation chart in Google Postmaster Tools was the first thing many senders checked. One…
Adeline AI: How Warmy’s AI Warm-Up Engine Works (2026)
Adeline is Warmy’s built-in AI email assistant, now live inside every user account. In a nutshell, Adeline AI…
Allegrow Alternative 2026: Warmy vs. Allegrow Compared
TL;DR: Warmy.io and Allegrow both help B2B senders reach the inbox, but they solve different parts of the…
Mail-Tester alternative: Warmy vs. Mail-Tester comparison (2026)
TL;DR: Warmy.io and Mail-Tester both help your email reach the inbox, but they solve different problems. Mail-Tester is…
Warmy vs Smartlead (2026): Which should you use?
TL;DR: For deliverability, warm-up quality, inbox placement testing, and continuous monitoring across any sending setup, including custom SMTP,…
Best MailToaster alternative: Warmy vs. MailToaster in 2026
Warmy and MailToaster both promise the same outcome: more of your email in the inbox and less in…
Best Mailflow alternative 2026: Warmy vs. Mailflow
Warmy and Mailflow are both email warm-up tools, but they work at different scales. Mailflow is a free-to-low-cost…
Warmy.io and Mailvio Partner to Solve the Deliverability Problem That’s Costing Retention Email Marketers Millions
Warmy.io, the AI-powered email deliverability platform that combines warm-up, inbox placement testing, and continuous monitoring in one environment…
Workspace Management in Warmy: Separate Billing, Teams & Access
Agency owners and multi-brand businesses managing email deliverability for multiple clients face a critical challenge: how to keep…
Seed List for Microsoft 365: Why Email Marketers Need It in 2026
A Microsoft 365 seed list is a curated set of genuine Microsoft 365 mailboxes that receive your campaign…
Warmy API: New Endpoints for Mailbox Headers, Warmup Statistics, and Domain Monitoring
We’ve released a new set of API v2 endpoints that give developers and technical users significantly more control…
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