Free outbound asset · PDF guide

What your cold email hits at 39 SaaS companies. Free.

Gong, ZoomInfo and Loom all have Proofpoint in front of their inbox. 35 of the 39 well-known SaaS companies I checked run on Google Workspace, and 0 on Microsoft 365. This guide shows what each of the 39 runs, how to check any prospect in 60 seconds, and the 7 checks I run on my own domains before sending.

01

All 39 domains: inbox provider, security gateway, and every tool allowed to send email as them.

02

How to read an MX record: Google, Microsoft, Proofpoint, Mimecast or Barracuda, in one command.

03

What changes in your sending when a lead sits behind a gateway, plus a 7-step pre-send checklist.

PDF GUIDE

Before You Hit Send

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4 pages Nothing to install Public DNS, Oct 2026

What's inside

Read it before your next campaign.

In the guide

  • The scoreboard: 39 SaaS domains
  • The full table, gateways first
  • 7-step pre-send checklist

What you can do with it

  • Split gateway leads into their own campaign
  • Check any prospect with one command
  • Catch a listed sending domain before it costs you