[Coco] Revisit: Best (Linux) email client for this list.

[James Ross]

My 2018 new years resolution was to switch to Linux for all my day to day computing needs including CoCo development. Going on my 5th day using Lubuntu 17.10 and I like it! I love how fast it is on this 3 year old hardware. 

Currently using the default email client Sylpheed and it seems to be old-school w/o many frills, but fast and w/ some threading support. It seems to work OK. BUT are there any compelling reasons to switch to another email client? Thunderbird / Evolution or other?

What Linux (or multi-platform) email client do you use for the list? and why? Hope it's on topic folks! :) 

James