Alternatives to NaSMail for all platforms with any license

Gmail

Gmail is a free search-based web-mail service. It offers a full featured web-based email client with search capabilities, a mailbox with Pop and IMAP access, SPAM...

Free Web Android iPhone Chrome OS Android Tablet ... iPad Chrome Android Wear Android TV Software as a Service (SaaS)
Basic html mode Custom Backgrounds Integrated Chat Integrated Search ... Outlook integration Canned responses Emoji Text support Multiple Account support Works Offline Thank you pages IFTTT integration Support for IMAP Integrated Spam Protection Mail filtering Email Server Organize mails Suggested replies Threaded Conversations Unified inbox Web-Based Yahoo Integration Add a feature

3114 Like
Apple Mail

There’s big news attached. The best way to manage email on a Mac gets even better with OS X Yosemite.

Free Mac iPhone iPad
Bundled with macOS CalDAV CardDAV Encrypted Email ... Exchange Organize mails Rich text editing UI customization Add a feature

226 Like
OpenProject

OpenProject is an open-source project management software with a wide set of features and plugins. It supports project timelines / Gantt charts, issue tracking, wiki...

Freemium $ $ $ Open Source Web Self-Hosted Ruby Cloudron
Gantt-charts Agile boards Email tracking Kanban boards ... Task Management Work Item Tracking Computer-aided manufacturing (CAM) Cost Calculator Cost estimate Gantt-charts Issue Tracking Project Tracking Reporting Splitting costs Timeline Wiki Add a feature

75 Like
Roundcube

Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client...

Free Open Source Self-Hosted PHP Cloudron
Hostable PGP Encryption Php Add a feature

146 Like
Zoho Mail

Zoho Mail is a webmail service built with the needs of a modern business in mind. It provides features for business users to communicate effectively while catering to...

Freemium $ $ $ Mac Windows Linux Web Android ... iPhone
Custom domain Ad-free Document sharing Integrated Spam Protection ... Mail filtering POP3 Support Privacy focused SMTP integration Two factor authentication Add a feature

92 Like
Polymail

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

Commercial $ $ $ Mac iPhone iPad
Sync Contacts Email scheduling Email tracking Multiple Account support Add a feature

23 Like
Squirrelmail

SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure...

Free Open Source Self-Hosted PHP
Cross-platform Exchange On-premises software SMTP Add a feature

24 Like
Teknik Mail

Teknik was created to provide users with web services that they can trust. Services range from url shorteners to pastebins and encrypted file uploads. Teknik Mail is a...

Commercial $ $ $ Open Source Web
Support for IMAP POP3 Support Add a feature

4 Like
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Webmail Lite

Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail...

Free Open Source Web Self-Hosted
No features added Add a feature

16 Like
WunderMail

WunderMail is a beautiful mail app especially created for the use of Gmail. By using the latest Fluent Design principles, WunderMail perfectly combines the user...

Freemium $ $ $ Windows Gmail
Gmail integration Add a feature

2 Like