MailMate vs Unibox

While most email clients support searching content from their To, From and Cc fields, MailMate lets users search down to the different sections of these fields. For example, you can search for the address only, or the name only, or even any one of the embedded headers. Subjects can be searched by prefixes, or by specific words which may be contained within and so on.

MailMate is extremely keyboard-focused. Almost every action can be configured to be achieved through a key combination in the settings. With the help of the keyboard shortcuts you can easily navigate through thousands of messages to find the one you need.

Markdown is a way to format text quickly using only the keyboard. Different text characters create different text: for example, putting asterisks (*) around a word or group of words will italicize them, while double asterisks (**) will bold that text. Markdown is a basic formatting system that can then be adapted to HTML or other formats.

• you can choose out of tenths of mailheaders (several hundreds including virtual headers)
• "<header> is (not) in <folder> <header>" operator which enables you to do cool filters
• each smart folder can have smart subfolders by an user definable key

MailMate's UI is very basic. The icons are limited to some default MacOS standard folder images and the interface is very clean and simple, showing only what's needed without any fuss or distracting colours. Instead, opting for a mostly grey interface, with a sprinkle of some other colours here and there.

The official documentation for MailMate is very thorough and helpful. It covers all options and features in a clear and efficient manner.

Both MailMate's speed and performance are highly reliable.

Faster the Mail.app specially if you have many emails

One can define tupels of IMAP keywords and tags (which are shown in UI). In case of Gmail one can define triples of IMAP Keywords, Tags, and gmail lables.

(in Thunderbird one can only define the tags, whereas the corresponding IMAP keyword is not user-definable.)

Unibox's interface is very clean and easy to understand. It has a classic two-pane interface with all users that have sent emails on the left side and any email currently being read on the right.

Every UI element is only visible when needed. For example, every time you hover on a discussion the trash can, which is otherwise invisible appears.

Unibox groups different emails by user instead of subject. This makes it easy to keep track of messages sent to a particular person and to keep track of different discussions.