Spark is really the perfect email client for the perfectionist. The main reason is that the client allows you to completely clear your inbox. You receive an email, read it, and immediately determine for yourself where to direct it - up to and including deleting it. This is convenient and prevents the situation where you have a clogged inbox and don't know what to do with a huge amount of emails.
Also speeds up the work with mail and a great modern interface, which allows you to work with Spark on an intuitive level. The program is similar to some modern messenger, but there are more features and it is immediately obvious that this is a complex email client. You can even customize the main menu of the program - you will decide how to arrange its elements in order to always have quick access to the most important functions and put away those that are not really needed.
A convenient and fast notification system will allow you to respond to mail as quickly as possible, and a system that offers sorting on the spot, rather than later, motivates you to make a decision about an email right away. This approach encourages workflow - you won't be tempted to leave everything "for later" and end up spending separate time sorting later.
Reviews - Spark