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Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues.

Unspam.email is an online spam tester tool for emails. Improve your deliverability with the free email tester. The service analyzes the main aspects of an email and returns a spam score and predicts results with a heat map of your email newsletter.