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Deliverability

GlockApps

Complete suite to test and monitor your email deliverability across all providers. GlockApps checks where your emails actually land on Gmail, Outlook and Yahoo. Essential for teams doing high-volume cold email.

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Who's it for?OpsMarketerGrowth

Review by a Growth Engineer

My verdict: the reference tool for serious deliverability monitoring.

If your revenue depends on email deliverability, GlockApps gives you the visibility needed to avoid nasty surprises. Complete suite to test and monitor your email deliverability.

GlockApps tests where your emails land (inbox, spam, promotions) across all providers (Gmail, Outlook, Yahoo, etc.), analyzes your authentication (SPF, DKIM, DMARC), and monitors your reputation. Starting at $49/month. The interface is a bit dated, but features are solid. If you do high-volume cold email, GlockApps gives you valuable visibility.

What I like less: the interface could use a refresh. Pricing can add up quickly if you need lots of tests. And for one-off tests, it's overkill.

My advice: use Mailtester.com for quick, free tests. Move to GlockApps when you need continuous monitoring or you're managing multiple sending domains. The investment pays off when deliverability directly impacts your revenue.

Why add it to your stack?

When you do high-volume cold email, GlockApps gives valuable visibility into where your emails actually land. The difference between 'sent' and 'received in inbox' can make or break a campaign. It's the tool that lets you diagnose before it's too late.

What you can do with it

  • 1See exactly where your emails land on each provider: inbox, spam, promotions, or blocked
  • 2Verify that SPF, DKIM, DMARC are correctly configured and identify issues
  • 3Receive alerts if your reputation or inbox placement degrades
  • 4Test different versions of your emails to optimize inbox placement

What it does

  • Inbox placement testing (Gmail, Outlook, Yahoo, etc.)
  • Authentication analysis (SPF, DKIM, DMARC)
  • Domain and IP reputation monitoring
  • Automated spam tests
  • Real-time deliverability alerts

How much?

Starting at 49

Starting at $49/month for the Starter plan.

The detailed verdict

Do I really need this?

For serious email teams sending volume, it's very useful. For occasional use or small volumes, Mailtester.com is enough for quick free tests.

Does it play nice with my stack?

Integrates with major sending platforms. API available to automate tests in your workflows. Webhooks for alerts.

Is it easy to pick up?

Initial setup is simple: you send to their test addresses, they analyze. Reports are clear and actionable even if the UI is dated.

Is the UX any good?

The interface is a bit dated, not the most modern design. But it's functional and data is well presented. You come for the data, not the UX.

Is it worth it?

$49/month for Starter, goes up quickly with test volume. But when deliverability is critical for your business, it's an investment that pays off. A burned domain costs much more than a GlockApps subscription.

What I like

  • Essential for teams doing high-volume cold email
  • Perfect for serious email marketers who want to continuously monitor their reputation
  • Ideal for agencies managing multiple sending domains

What I like less

  • Overkill for simple one-off tests as Mailtester is enough
  • Pricing can add up quickly for tight budgets
  • Too advanced for those just starting in email marketing

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