Deliverability testing helps you verify whether your emails reach inboxes instead of landing in spam folders. When you integrate deliverability checks directly into your email service provider (ESP), CRM, or marketing automation platform, you can catch issues before sending. This approach lets you test sender reputation, authentication setup, spam score, and inbox placement while staying within the tools you already use.

You can run these tests with platforms like HubSpot, Mailchimp, SendGrid, Shopify, WordPress, Zapier, and others. By embedding deliverability validation into your workflow, you reduce the risk of missed messages, lost conversions, and damaged sender reputation. Whether you’re sending to subscribers, customers, or prospects, confirming that your emails are properly authenticated and trusted improves your chances of reaching the inbox.

What you'll find in this hub

  • Guides on integrating deliverability testing with HubSpot, Mailchimp, and SendGrid
  • How to verify email lists before upload in Constant Contact and GetResponse
  • Methods to run batch tests using Airtable and Email Verification APIs
  • Real-time validation workflows for Drip, Braze, and Keap
  • Best practices for pre-sending checks in Pardot and Marketo
  • Tutorials for syncing verified data to Microsoft Dynamics and Dynamics 365

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Put it to work

See how your own emails score: run a deliverability test with MailTester.