MasterBase - On demand Email Marketing software

Thexyz - Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.

JangoMail - Description of the software: JangoMail software is a fantastic tracking solution system that many businesses can utilize for their marketing.

ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.

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

Clearnet - Clearnet is an email service provider where the user can set up an email account and begin sending and receiving emails.