Tool

Google Postmaster Tools

Google Free Intermediate

This is where you see, in Gmail's own words, how Gmail actually sees your domain: spam rate, IP and domain reputation, authentication pass rates, and delivery errors. Set it up as soon as you have a domain sending real volume, it is the closest thing to ground truth once mail-tester checks are done.

  • Shows your real spam rate as measured by Gmail, keep it under 0.30 percent
  • Tracks domain and IP reputation over time, not just a single snapshot
  • Free, official, and the same dashboard Google's own sender guidelines reference
Open on postmaster.google.com ↗

The question it answers

  1. My cold emails keep landing in spam. How do I fix deliverability?

Read with it

  1. A tactical follow-on covering the channels and motions top B2B startups scale after the first ten. Grounds distribution... Lenny's Newsletter Article · ~15 min read How to win your first 10 B2B customers Lenny Rachitsky
  2. This is the book most modern cold outbound advice quietly borrows from, so reading the source is worth it. Its "Cold Calling... Amazon Book · ~208 pages Predictable Revenue: Turn Your Business Into a Sales Machine with the $100 Million Best Practices of Salesforce.com Aaron Ross and Marylou Tyler
  3. An Indian founder story where the early demand test was manual, cold emails and direct outreach to find the first customers... Prime Venture Partners Podcast Podcast · ~50 min How Khadim Batti Built Whatfix Into a Global SaaS Leader Prime Venture Partners
  4. Once you have a list of people to reach cold, this shows you how to write emails they actually answer. Seven concrete... Y Combinator Startup Library Video · ~33 min How to Convert Customers With Cold Emails Aaron Epstein
  5. If your warm interest is coming from larger companies that never sign, this Indian podcast episode digs into why enterprise... The Neon Show Podcast How Startups Can Sell to Big Companies (The Neon Show) Siddhartha Ahluwalia
  6. This is Google's own rulebook for what gets an email into Gmail instead of spam: SPF or DKIM for every sender, SPF, DKIM, and... Google (Gmail/Workspace support) Article Email sender guidelines Google (Gmail/Workspace support)
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