Litmus - litmus tests and tracks your email campaigns, so you can always put your best design forward.
JangoMail - Description of the software: JangoMail software is a fantastic tracking solution system that many businesses can utilize for their marketing.
Brevo - 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.
Thexyz - Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.
250ok - 250ok offers a SaaS-based platform to monitor and measure the deliverability of email networks.
GoDaddy Professional Email - GoDaddy Professional Email is a domain-based email service for businesses.