Email deliverability infrastructure. Not another warmup tool.
Bot warmup is dying.
Humerly isn't.
Deliverability insights from the Humerly team.
Your mail subdomain is not your domain, and most checkers test the wrong one
If you send from mail.yourcompany.com, most deliverability checkers test the name you own, not the name you send from. We shipped that bug ourselves. Here is the difference and how to check yours.
Read More →42% of our bounce log was not about our mail
On our sending host, 304 of 720 SMTP log records in 24 hours were refused connections, not delivery failures. Here is how to tell the two apart.
Read More →Do You Need DMARC for Cold Email?
You set up cold email, warmed the domain, still hit spam — and someone says fix your DMARC. Here is whether you need it, what it actually does, and how to set it up safely.
Read More →6 Best Free DMARC Checkers in 2026 (That Fix, Not Just Flag)
Most free DMARC checkers confirm a record exists and stop there. We compare the six worth your time on what they actually check, what their free plans really cover, and which ones hand you the exact DNS fix instead of just flagging the problem.
Read More →The 2026 Gmail and Microsoft Compliance Checklist for Cold-Email Agencies
Gmail now rejects non-compliant mail at the server level. Microsoft does the same. Here is the exact checklist your agency needs to pass — and how to verify it in under a minute.
Read More →Why Your Warmup Tool's 99% Health Score Doesn't Mean Your Emails Reach the Inbox
Warmup dashboards measure pool activity, not real inbox placement. Here's what the green number actually tells you — and what to check instead.
Read More →The 2026 Gmail and Microsoft Sender Rules: What B2B Agencies Get Wrong (and How to Pass)
Gmail and Microsoft now enforce their sender rules automatically — miss them and your mail gets a 550 rejection, not a warning. The five mistakes B2B agencies make most, and a 2-minute way to check your domain.
Read More →Why Your Business Emails Land in Spam (and How to Fix It in 10 Minutes)
Roughly 1 in 6 business emails never reaches the intended inbox. Here's why it happens — SPF, DKIM, DMARC, and domain warmup — and how to fix it in 10 minutes.
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