📧 Email Delivery Software

Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

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Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.

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.

Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.

Sendmail is a general purpose internetwork email routing facility that supports many kinds of...

sSMTP is a simple MTA to deliver mail from a computer to a mail server.

msmtp is an SMTP client.

Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free

Use our powerful Email APIs to deliver all your business critical emails on time and to the Inbox. We are the world’s only ESP that gives cashback on emails opened.

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...