MailMate vs GyazMail

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.

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.

• 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

Both MailMate's speed and performance are highly reliable.

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

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.)

Goichi Hirakawa, the main developer of GyazMail, has been committed to his project since 2003 and delivers updates regularly.

The user can define complex mail sorting rules for incoming and outgoing mail.

As of v1.6

GyazMail is a native macOS application, based on the Cocoa API.

the mailbox view is very comfortable

GyazMail is a Japanese product, so it has very good support for Asian languages.

GyazMail is available for all versions of Mac OS X / macOS starting with version 10.1

In GyazMail you can set a maximum number of characters per line. The program will wrap the lines using hard wrapping on sending. This feature is very useful for newsgroups that require a hard break after 72 characters.

Uses Oniguruma regular expression library, which is a very elaborate regular expression engine that supports a big variety of character encodings. This makes very much sense with e-mail, as in an e-mail theoretically any character encoding could be used. Because it is free software (BSD), written in C, very elaborate, stable and still actively maintained it is also used in Atom, Take Command Console, Tera Term, TextMate, Sublime Text, SubEthaEdit, and jq.