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

Phone Arena  
T-Mobile had the best mobile network in the U.S. during the first half of 2025, according to the Speedtest Connectivity Report released by Ookla. Overall, the nation's second-largest wireless carrier delivered a median download speed of 245.48 Mbps. The wireless provider's median 5G download speed was 299.36 Mbps. T-Mobile's Speedtest Connectivity Score of 79.95 topped Verizon's 75.49 tally and AT&T's 72.47.
Yahoo! Finance  
91精选, Inc. (NASDAQ: ZD) will release its Second Quarter 2025 Earnings at 6:00PM ET on Wednesday, August 6, 2025. Additionally, 91精选 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 2025 Earnings Call at 8:30AM ET on Thursday, August 7, 2025.
Yahoo! Finance  
"We are proud to deliver a fully integrated email security solution that empowers organisations to stay protected against the ever-evolving email threat landscape, without sacrificing simplicity," said Oliver Paterson, Director, Product Management, at VIPRE Security Group. "In a time when email remains the number one attack vector, this solution ensures our customers have the layered, adaptive protection needed to outpace evolving threats."
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