List Quality Check

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Subscriber List Analyzer

Know where your subscribers receive their emails.

Improve your email marketing strategy by seeing which mailbox providers (MBPs) make up the majority of your list—powered by the seed list optimizer of Validity Everest.
Fill out the form to see the results
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See the composition of your email list.

See what percentage of your audience uses MBPs like Gmail, Office 365, Yahoo, Comcast, and more.

Step 1

Upload your email audience list of up to 3,000 addresses.

Step 2

Wait for your list to process.

Step 3

See what percentage of your audience uses certain MBPs.

Sharpen your sending knowledge.

Learn how to improve your deliverability.


Fundamentals of Email Deliverability


Inbox Insiders: List Hygiene Strategies for a Post-MPP World

Podcast Episode

What’s the Deal with Email Deliverability?

Add more tools to your email arsenal.

Free tools that help you level up your email marketing program.

Subscriber List Analyzer

See a breakdown of your subscribers’ mailbox providers.

Subject Line Previewer

See how your subject line will appear in the inbox.

Complaint Monitor

Sign up to receive your complaint data.