DMARCbis (RFC 9989): What Changed and What You Do Now
TL;DR In May 2026 the IETF published RFC 9989, 9990, and 9991, the first substantive update to the…
Warmy Blog
Turn emails into revenue. Master deliverability, inbox placement, and warm-up strategies to scale outreach while protecting your domain reputation
Email Best Practices
How to Create & Check an SPF Record in 2026 (+Free Generator)
TL;DR An SPF record is a single TXT record in your domain’s DNS that lists which servers are…
How to Improve Email Sender Reputation Quickly: 9 Ways (2026)
How to improve email sender reputation quickly is to fix authentication first, then warm up the domain, clean…
Email Deliverability
What Is an Email Health Score and How to Improve It (2026)
An email health score, also called an email deliverability score, is a numerical rating, typically from 0 to…
Email Warm-Up for Player Reactivation Campaigns: What Actually Works
TL;DR: Reactivation campaigns are the hardest sends in iGaming email because dormant player lists carry weak engagement signals…
Best Email Warm-Up Tools for Gambling Operators (Not Just Cold Email)
TL;DR: Most email warm-up tools are built for SDR-style cold outreach, not high-volume casino CRM sending, and that…
Email Marketing
7 Cold Email Templates for Digital Marketing & Creative Agencies (That Actually Get Replies)
The cold emails that get replies do three things: reference one specific detail about the prospect, ask for…
6 Best Email Warm-Up Tools That Integrate with Outlook / Microsoft
Email warm-up tools that integrate with Outlook are platforms that gradually build sender reputation by generating realistic email…
AI Email Warm-Up & Inbox Placement Tools for Gmail (2026)
AI inbox placement tools for Gmail are platforms that combine automated email warm-up, real inbox engagement simulation, and…
Email Warmup
Best Warmforge Alternative? 7 Top Tools Ranked (2026)
TL;DR: The best Warmforge alternatives in 2026 are Warmy, MailReach, Instantly, Lemwarm, Warmbox, Warmup Inbox, and Mailivery. Warmy…
How to Warm Up a Custom SMTP Domain (2026 Guide)
To warm up a custom SMTP domain, connect your mailbox to a warm-up tool using its SMTP and…
Where to find affordable email warmup tools for startups
Affordable email warmup tools for startups are platforms that build a new domain’s sender reputation at a price…
Product Updates
Warmy vs Smartlead (2026): Which should you use?
Warmy and Smartlead both promise better inbox placement, but they are built for different jobs. Warmy is a…
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…
Spam & Blacklists
7 Best Email Blacklist Monitoring & Removal Tools (2026)
TL;DREmail blacklist monitoring tools scan your sending IP and domain against public reputation lists like Spamhaus, then alert…
What Is the Spamhaus Blacklist and What Does It Do to Your Email Deliverability?
Spamhaus can kill your email deliverability overnight. Warmy's 2026 research breaks down every list, what triggers them, and…
SURBL Blacklist: What Is It, Why You Get Listed, and How to Fix It
This SURBL blacklist report by Warmy.io discusses what triggers a SURBL listing, how to check your domain, and…
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