Make it to the inbox, not the spam folder

Litmus scans your emails against 25+ different tests, identifies issues that might keep you from the inbox, and provides actionable advice for how to fix them. Get the peace of mind that comes with knowing if your brand is likely to reach the inbox.

Know if you’re blocklisted

Check your IP addresses and domain names against common blocklists, and get notified if any of them could affect delivery

Get actionable advice

Utilize hands-on, practical advice for how to fix issues and improve your email’s chances of reaching the inbox—even if you’re not a delivery expert (yet)

Set your infrastructure up for success

Validate that your email is being properly authenticated using DKIM and SPF, and ensure your DMARC record is set up correctly


of emails show at least one spam-related issue that could impact deliverability*

Source: Analysis of 1.5 million emails tested with Litmus Spam Testing

Pre-screen your messages across major spam filters

Tests include spam filters from inbox providers and webmail services, as well as score-based filters that are frequently used for corporate spam filtering.

Score Filters

Microsoft Exchange
Outlook Desktop
Spam Assassin

Placement Filters
AOL Mail
G Suite
Google Inbox
Office 365
Litmus Integrations

Integrate Spam Testing with your email service provider

Say goodbye to switching between email tools to run a spam test. With ESP Integrations for Spam Testing, it’s never been easier—or faster—to run a comprehensive and accurate spam test. Simply connect your email service provider (ESP) to Litmus, select the draft email to test, and let Litmus do the rest.

*More ESPs coming soon.

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