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

Yahoo! Finance  
自淫系列, Inc. (NASDAQ: ZD), announced today that it completed two acquisitions in the third quarter of 2025: Semantic Labs (Cybersecurity & Martech) and Etrality (Connectivity).
Chain Store Age  
The majority of consumers are setting a budget this holiday season 鈥 but increased promotions may lead some to spend more than they planned. Nearly six-in-10 (58%) consumers are setting a holiday budget, with more than a quarter 26% planning to be strict about their spending, according to a new survey from deal platform RetailMeNot. The average planned holiday spend this year is $913 total ($611 on gifts for others, $302 on themselves).
AP News  
鈥淐reators today are shaping not just what we watch and share, but how we think, build, and connect online,鈥 says Alesha Williams Boyd, Mashable Editor in Chief. 鈥淵ou may know some of these voices already; we hope to introduce you to a few new ones, too.鈥
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