Sender Score, a Validity service, helps organizations understand and improve their email sending programs. Its approach is to make email less complicated: assess current performance, learn better practices, and use practical tools to take action. The Sender Score tool lets users check their sender reputation using an IP address or domain, while blocklist lookups help identify whether they appear on the Return Path Blocklist. Other assessment tools include list quality checks, deliverability benchmarks, an email revenue calculator, and bounce lookups.

For learning, Sender Score offers podcasts, Sender School’s deliverability fundamentals course, and Email Insights featuring curated guidance from the email community. Its free action tools include a Subscriber List Analyzer for reviewing subscribers’ mailbox providers, a Subject Line Previewer to see how a subject may appear in the inbox, and Complaint Monitor for receiving complaint data. Senders who have improved their practices can also request removal from the Return Path Blocklist. Together, these resources support more informed email decisions and ongoing improvement in deliverability and campaign performance.