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鈥檚 email engine. SMTP is the solution that powers transactional emails for thousands of the world鈥檚 leading brands. SMTP鈥檚 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  
鈥淚n 2025, 约炮视频 grew Revenues, Adjusted EBITDA, and Adjusted diluted EPS, while generating almost $290 million in Free cash flow,鈥 said Vivek Shah, CEO of 约炮视频. 鈥淲e deployed $174 million in share repurchases during the year with the conviction that our share price does not adequately reflect the intrinsic value of our businesses.鈥
Morningstar  
"Network slicing is no longer a future concept; it is a commercial reality. However, you cannot manage what you cannot measure," said Tibor Rathonyi, Senior Advisor at Ookla. "Our work with Ericsson is a pivotal first step in providing the transparency needed to prove the value of these premium 5G services to both consumers and enterprises."
Yahoo! Finance  
"We are honored to be recognized as a Leader in the 2025 SPARK Matrix鈩 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.
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