Postmark - Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
EmailSuccess - EmailSuccess is an advanced MTA built to handle the most critical reliability, performance, security, and deliverability requirements.
PowerMTA - PowerMTA is an industrial-strength software for high-volume email delivery.
turboSMTP - turboSMTP is a reliable, powerful, easy-to-use SMTP server that maximizes the deliverability of all...
PackageX Receive - PackageX Receive digitizes package-receiving operations and delivers world-class package management solutions.