- Control over my emails instead of being behind a wall
- Supports all the features of SMTP instead of what the web application guy decided to provide
- Graphical representation of common text patterns used in emails since the early days
- Allows me to store all my contacts information without sharing it with whatever server somewhere in the internet
- Aggregation of multiple accounts
- A very cool feature of editing existing emails as new ones, instead of doing a copy-paste dance
- I favour native applications over web ones when given the choice
EDIT: Forgot to mention NNTP support
- Control over my emails instead of being behind a wall
- Supports all the features of SMTP instead of what the web application guy decided to provide
- Graphical representation of common text patterns used in emails since the early days
- Allows me to store all my contacts information without sharing it with whatever server somewhere in the internet
- Aggregation of multiple accounts
- A very cool feature of editing existing emails as new ones, instead of doing a copy-paste dance
- I favour native applications over web ones when given the choice
EDIT: Forgot to mention NNTP support