#smtp
5
2026-08-29
Maileroo
unrated
SMTP relay and email API for developers. 5,000 emails per month, unlimited domains, free email verification, blacklist monitoring, mail tester and more.
2026-08-29
Mailtrap.io
unrated
Email API and SMTP with 4,000 emails/month free, limited to 150 emails/day. Email Marketing includes 500 contacts and 1,500 emails/month. Email Sandbox includes 50 test emails/month, one sandbox, and up to 10 stored emails.
2026-08-29
chasquid
unrated
SMTP (email) server with a focus on simplicity, security, and ease of operation. (Source Code) Apache-2.0 Go
2026-08-29
Postal
unrated
Complete and fully featured mail server for use by websites & web servers. (Source Code) MIT Docker/Ruby