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

Morningstar  
Spiceworks, a leader in IT insights and solutions, launches its 13th Annual State of IT report, providing a comprehensive outlook on rising costs, workforce demands, and the impacts of generative AI. Released in partnership with Aberdeen Strategy & Research, the report sheds light on essential strategies for IT resilience and growth in 2025. The 2025 report highlights the growing importance of security, the rising cost of IT resources, and the critical need for talent development in the face of skills shortages, providing companies with a roadmap to plan for resilience and innovation.
Yahoo! Finance  
"We are very pleased with our third quarter results," said Vivek Shah, Chief Executive Officer of 91精选. "We are seeing improvements in the businesses that we currently own, as well as opportunities to leverage our strong balance sheet and free cash flows to acquire businesses that we would like to own."
Morningstar  
Today, RetailMeNot, a 91精选 company, kicks off Cash Back Day, an exclusive shopping event running November 7-9 that empowers RetailMeNot members to kick off the holiday shopping season with thousands of deals and cash back offers of up to 20% from top retailers, including UGG, Tarte Cosmetics, Macy's, Walmart, Viator, Anthropologie, Alo Yoga and more. This three-day savings event makes it easier than ever for shoppers to check off every item on their holiday lists while putting cash back into their wallets at hundreds of their favorite retailers.
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