Alternatives to myMail for Mac with any license

Thunderbird

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku
Built-in RSS reader Extensible by Plugins/Extensions Extensible by Plugins/Extensions Built-in Calendar ... Calendar integration Categories Customizable Extensible by Plugins/Extensions Free API Gmail integration Google Calendar integration Import from Google Reader Support for IMAP Integrated Chat Integrated Web Browser Multiple Account support Export to OPML Import feeds from OPML POP3 Support Portable SMTP integration Tabbed interface Support for Themes Add a feature

1757 Like
Microsoft Office Outlook

Part of the Microsoft Office Suite, Outlook is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

Commercial Mac OS X Windows Web Android iPhone ... Android Tablet Windows Phone iPad Apple Watch Android Wear
Built-in Calendar Dark theme Signature with image Add a feature

311 Like
Spark

E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.

Free Mac iPhone iPad Apple Watch
Calendar integration Cloud sync Configurability Configurable request timeout ... Multiple Account support Export to PDF Sync across Devices Add a feature

60 Like
Opera Mail

Opera Mail powerfully organizes, indexes, and sorts your messages. It has spam filtering (both automated and Bayesian), supports POP3 and IMAP, newsgroups as well as...

Free Mac OS X Windows PortableApps.com
Built-in RSS reader Integrated Spam Protection Message Filtering Portable Add a feature

96 Like
- Discontinued Opera Mail seems to be no longer updated, but you can still download it from: http://www.opera.com/computer/mail
Newton Mail

Newton is a fully featured mail client available for Android, iOS, macOS and Windows. Works for watch too. It's based on cloud so you can connect it to any account...

Commercial Mac OS X Windows Android iPhone Windows RT ... Android Tablet iPad Apple Watch Android Wear
Sync between devices Combined email cloud syncing Conversation view Focused Inbox ... Multiple languages Real-time pushing Salesforce integration Add a feature

39 Like
Polymail

The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.

Freemium Mac OS X iPhone iPad
Sync Contacts Email scheduling Email tracking Multiple Account support Add a feature

20 Like
Unibox

Unibox is a people centric email client that organizes your messages by person. It avoids having email like a to-do list. Features: - Unibox supports IMAP servers:...

Commercial Mac OS X
Multiple Account support Add a feature

13 Like
Astro

Modern email and calendar apps for Mac, iOS, Android, Slack and Alexa, powered by Artificial Intelligence. Astro keeps you focused on what's most important.

Free Mac Android iPhone iPad Slack ... Amazon Echo (Alexa Voice Service)
Calendar integration Email tracking Google Calendar integration Multiple Account support ... Snooze reliability Add a feature

20 Like
Hiri

Fast, good looking email client. Lighter than MS Outlook with some unique and clever features. Works ONLY with Outlook / Exchange.

Commercial $ $ $ Mac Windows Linux
Calendar integration Convert Email to Task Add a feature

15 Like