OpenSMTPD Alternatives [Page 4]

mailsend-go is a command line tool to send mail via SMTP protocol, written with golang.

MailerQ is a high performance Mail Transfer Agent (MTA) designed for delivering large volume email messages at very high speeds.

Warm up your cold email inbox, and never land in spam anymore!

Try for free freemium $9.0 / Monthly

The fastest and easiest way to gather actionable feedback from your customers

freemium $224.0 / Monthly (10,000 send limit, 5 projects, 10 users, 35+)

Mailo is an email client where you can send and receive emails to and from anyone with an email address.

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

Visit website paid $19.5 / Monthly (Pro)

Microsoft Office is an office suite of desktop applications, servers, and services for the Microsoft Windows and OS X operating systems.

Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.

Free utility to send emails from the command line. No Installation. All contained in one file.

Open Source

MailEnable is a Windows based mail server and email server program that is packed with the state of the features and functions like antivirus and spam filtering system, webmail management system, cardDAV, CalDAV and much more.

Google's encompassing suite of cloud-based business apps.

Lettre is a mailer library for Rust.

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Twilio SendGrid Email API is a conversation platform that consists of the module, which enhances your communication strategies and interacts with consumers to get their response and improve your business quality.