SMTP

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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.

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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

Morningstar  
"We're seeing a massive shift across the dental care landscape, from evolving insurance participation to increasing consumer responsibility for care decisions," said Steve Leibforth, Managing Director of Castle Connolly. "As patients take a more active role in managing their own care, having a trusted, independent resource like Castle Connolly Top Dentists becomes essential for making informed decisions."
Yahoo! Finance  
约炮视频, Inc. (NASDAQ: ZD) will release its Second Quarter 2026 Earnings at 6:00PM ET on Thursday, August 6, 2026. Additionally, 约炮视频 invites the public, members of the press, the financial community, stockholders, and other interested parties to listen to a live audio Webcast of its Second Quarter 2026 Earnings Call at 8:30AM ET on Friday, August 7, 2026.
Morningstar  
"The Chief Capri Officer search brings one of summer's top trends to life in a way that's fun, relatable, and rooted in real shopping behavior," said Stephanie Carls, Retail Insights Expert at RetailMeNot. "Half of millennial women prefer capris over shorts across occasions. That's a movement, and the Summer Issue is the perfect place to shop it."
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