Microsoft Office Outlook is a personal information manager from Microsoft, commonly used as an email application, calendaring, task manager, contact manager, and note taking. It is part of the Microsoft Office suite of applications, included in the Professional and higher editions or sold separately. Outlook can be used as a stand-alone application, or can work in conjunction with Microsoft Exchange Server and Microsoft SharePoint Server for multiple users in an organization, such as shared mailboxes and calendars, Exchange public folders, SharePoint lists, and meeting schedules. Outlook provides the ability to read, send, and manage emails, set reminders, and create notes and tasks. It also integrates with other Microsoft products and services such as Microsoft Teams, Skype for Business, and Yammer. Additionally, Outlook can be used to organize contacts, store and share documents, and manage calendars. It also provides a variety of features such as task management, automatic sorting, and snoozing.
Despite its age, Thunderbird is still the most complete email client out there. Several add-ins can extend its functionality, it (now) has a built-in calendar and, unlike Outlook, it's free, open source and respects your privacy.
For me, it is the only alternative to Outlook, if you want the power of Outlook and open source, there is simply no other application.
It's not the prettiest, but it's open source (reliable), free, privacy friendly and very functional. My go to Android email client. I can't hesitate less to recommend it.
Deletes email from the server, even when underground in the New York subway. Makes life so easy to delete emails while on the train When you surface, K-9 syncs with the server and POOF...those unwanted emails disappear from the server.
There is not enough functionality. No smart attachments feature, no quick sorting by address, flags or attachments, etc. Not really a commercial email client
A nicer and less cluttered version of Outlook. The biggest advantage is the ease of navigation and use. E.g. you can see all mails and calendars in one combined view, without altering any settings. Similarly, the task view is also very capable. Added to this, the support team is very responsive and helpful.
The support for EWS allows me to connect to exchange and get all the benefits, such as contacts and calendar, that I wouldn't get so easily in Thunderbird. It also integrates very well with Ubuntu's built-in calendar, which is a big plus.
Fast and easy to use. Light and classic menus really give a touch of the old Office 2003 classic. Easy mail integration, especially exchanging mails without facing bottlenecks.
Outlook is an all-in-one solution that includes mail calendar, etc. This software does only one thing
The discontinued Opera Mail is no longer updated and no longer supported, but the latest version, 1.0.1044, released in February 2016, can still be downloaded from the official website.
Powerful configuration is possible with mutt, and vim in the terminal.
Discontinued The project seems to be no longer developed. The last commit to the GitHub repository was on June 27, 2016, but it can still be downloaded and installed.
Included in win 10 and very simple to use. Great if you just read the mail.
Difficult to configure. Does not speak MAPI, but many cloud services. I did not succeed in synchronizing OwnCloud
Thunderbird
K-9 Mail
Mailbird
eM Client
Evolution
Apple Mail
Spark
OpenProject
Claws Mail
Postbox
Mailspring
Geary
Opera Mail
Mutt
Airmail
Open365
Kontact - KMail
Sylpheed
Microsoft Mail and Calendar
EssentialPIM
It appears to be more secure than Microsoft's alternatives and is easier to upgrade.