SMTP

Reliable email relay, API, and delivery service

SMTP has been a leader in email relay services for over 20 years. The brand is synonymous with the technology that facilitates the internet’s email engine. SMTP is the solution that powers transactional emails for thousands of the world’s leading brands. SMTP’s relay services help build a better IP reputation, optimize inbox placement rates and ensure messages reach your subscribers.

5K annual users

5,000 annual users

11B emails sent

11 billion emails sent annually

5,000/s sending velocity

5,000 emails per second sending velocity

Recent News

Yahoo! Finance  
"We are honored to be recognized as a Leader in the 2025 SPARK Matrixâ„¢ for Enterprise Email Security. This acknowledgment reflects our commitment to delivering a truly comprehensive, layered approach to protecting email still the number one vector for cyberattacks. Our focus has always been on empowering organizations with modern, integrated tools that reduce risk, simplify operations, and strengthen resilience in a constantly evolving threat landscape," says Usman Choudhary, General Manager & CPO, VIPRE Security Group.
Yahoo! Finance  
"The Q4 2025 data reveals a troubling evolution in the strategy being adopted by cybercriminals – the systematic weaponization of trust," Usman Choudhary, General Manager, VIPRE Security Group, says. "Criminals are undoubtedly exploiting technical vulnerabilities, but they are also exploiting human confidence in the familiar – be that impersonating a trusted supervisor or executive, mimicking reputable companies and household brands, or hiding behind enterprise security protocols. They are targeting 'trust'. Their approach demands that we rethink how we identify and authenticate interactions and security strategies across every communication and business channel."
USA Today  
BabyCenter, a digital parenting resource which publishes annual reports on trending and popular baby names, is launching "a first-of-its-kind" loyalty program "designed to cheer parents on at every step." The new program titled "BabyCenter Rewards" gives parents the opportunity to turn "everyday app actions into points redeemable for discounts and free products from a lineup of brand partners," which include BabyBjörn, bbhugme, Bobbie, Bodily, DiaperBuddies, Dr. Brown’s, Good Start, Earth’s Best, ezpz, GloBowl, Lansinoh, Littlebot, Mabel’s Labels, Nanit, Pirouette Kids, and Prego Expo.
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