Claws Mail is a cross platform e-mail client based on GTK+.
Ranked in these QuestionsQuestion Ranking
Pro Low resource client
Claws Mail is a low resource e-mail client that is often default in low resource Linux distributions.
Pro Has many plugins for extra functionality
Pro Clean interface with 5 layout variants
Pro Good support for Google's services
Pro Saves emails in uncompressed readable format
Allows one to read archived emails with a text editor.
Con Interface looks old and setup is not easy
The icons as well as the rest of the interface look like an application from the early 90's, with this there is also no easy setup options built in like the more modern e-mail clients.
Con Saves emails in uncompressed format
This takes more space on the HDD.