PutsMail was originally developed by Pablo Cantero, a software developer based in São Paulo, Brazil.

Pablo experienced first-hand the difficulty of sending HTML emails to himself for cross-platform testing. He built PutsMail.com to help others in the same situation and email designers around the world loved it.

In 2014, Litmus purchased PutsMail and took over its development, continuing to offer it as a standalone free tool for email marketers to perform quick tests of their campaigns.

Once you’ve run a few tests with Litmus PutsMail, check out Litmus' full email testing suite to ensure an on-brand, error-free subscriber experience. Litmus helps you get more out of your emails with the power to test and preview in 90+ email clients—including Dark Mode—in one spot. In seconds.

Litmus provides the leading email optimization and collaboration solution for marketers. From Pre-send campaign development and testing to Post-send insights for future content optimization, Litmus improves marketing performance and strategy, delivering increased subscriber engagement.

With offices in Boston, San Mateo and London and backed by Spectrum Equity, Litmus is used by major global brands across every industry, including 80% of the Fortune 100, the top 10 retailers, 9 of the top 10 ecommerce brands and U.S.banks, and 23 of the top 25 U.S. advertising agencies. Learn more about Litmus at litmus.com, subscribe to the Litmus blog, or follow us on social media – Twitter, LinkedIn, Instagram, and Facebook.