Email Trust Checker – Find Out If Inbox Providers Trust Your Emails | Karen Grill
Custom GPT Diagnostic

Do inbox providers trust your emails?

Most people try to fix email performance with better subject lines and copy. Inbox providers are asking a different question first.

Get the Email Trust Checker $9
Custom GPT
Instant access
No technical knowledge needed
Takes about 3 minutes
Why Emails Miss the Inbox

You're optimizing the wrong thing.

The guessing loop
  • Is it my subject lines?
  • Is it the copy?
  • Is my list cold?
  • Did the algorithm change again?

That's why email starts to feel frustrating. Not because you're bad at writing. Not because email doesn't work.

Before inbox providers evaluate your content, they make a decision about you as a sender.

Can they reliably confirm this email is actually coming from you? If that answer is unclear, everything else gets evaluated differently.

You can have great content. But if inbox providers aren't sure who you are, delivery becomes inconsistent.

This isn't a copy problem. It's a foundation problem. And it starts before your email is ever read.

How It Works

Three steps to clarity

01

Answer a few simple questions

No DNS settings to check. No technical knowledge required. The checker asks plain-language questions about your setup.

02

The GPT evaluates your trust signals

It looks at the authentication and domain signals inbox providers use to decide how to treat your emails.

03

You get a clear result and one next step

Safe, At Risk, or Broken - plus one specific recommended action based on your situation. Not a list of ten things.

What's Included

What you get for $9

  • GPT
    Email Trust Checker (Custom GPT)
    Your diagnostic starting point. Answer questions, get a read on your trust signals.
  • ◠
    A clear signal on your current trust status
    Safe, At Risk, or Broken - so you know what inbox providers probably see from their side.
  • →
    One recommended next step
    Not ten things. Just the right one based on your specific situation.
  • ∞
    Instant access, no time limit
    Use it now, come back to it later. It's yours.
What your result looks like
Safe
Your domain trust signals look good. Inbox providers can confirm who you are.
At Risk
Some trust signals are missing or misconfigured. Worth addressing before they affect delivery.
Broken
Critical authentication gaps detected. This is likely affecting your inbox placement right now.

Each result comes with one clear recommended next step based on your specific situation.

Who This Is For

Is this for you?

This is for you if
  • You send marketing emails from your own domain
  • You're not sure whether SPF, DKIM, or DMARC are set up correctly
  • Your emails feel inconsistent and you're not sure why
  • You want a quick read on your foundation before doing anything else
  • You've never actually checked whether inbox providers trust your domain
This does not cover
  • Writing better subject lines or copy
  • Email marketing strategy or campaigns
  • List growth or engagement tactics
  • Technical implementation or DNS setup

This is a diagnostic only. It tells you where you stand and what to address first.

Note for Substack users: If you send through Substack, some authentication signals cannot be fully evaluated. Substack controls the sending domain, so DMARC enforcement and reporting are typically not available to individual creators. The checker can still help you understand potential risks, but results may be less precise.
Pricing

Clear answers in about 3 minutes.

Usually $29. Now $9 for a limited time.

$
9

One-time payment - Instant access

Email Trust Checker (Custom GPT)
Clear trust signal: Safe, At Risk, or Broken
One recommended next step for your situation
Instant access, no time limit
Get Instant Access for $9

Stop guessing. Start with the foundation.

Find out if inbox providers can actually confirm who you are before you spend another minute on subject lines and copy.

Get the Email Trust Checker  $9