259+ email tools for developers — transactional APIs, newsletter platforms, and drip campaigns. Alternatives to Mailchimp and SendGrid.
Email (IMAP/POP3), contacts and calendar server
Email verification API
Professional Laravel-based email marketing solution with advanced contact management
A small and easy to configure SMTP and POP3 server for Windows and Linux
Secure SMTP server implementation from the OpenBSD project
Email and SMTP testing with web and API interface
Complete and fully featured mail server for use by websites & web servers
Web user interface to access GNU Mailman
SMTP (email) server with a focus on simplicity, security, and ease of operation
All-in-one mail server with JMAP, IMAP4, and SMTP support and a wide range of modern features
Scalable no-SPOF IMAP/POP3 mail server
Fast, easy to administer, and secure Sendmail replacement