@h00p Thanks for the screenshots and comments!
Our overarching goal is to provide a fast, user-friendly, legible, and aesthetically pleasing interface while also expressing our profile in a unique way.
The current Runbox 7 UI font face is Avenir Next, published in 2004 as a redesign of the original Avenir font face to provide “typographical flexibility and optimal legibility”.
We chose it in part because of its legibility and as an alternative to Verdana Pro Light, which is used extensively in Runbox 6. Another font face we considered was Univers Next, but it was considered potentially problematic in smaller font sizes and smaller screens in part due to its default kerning.
Avenir Next does consume more horizontal space due to its roundness and legibility, and we are open to alternatives and custom theming as you have also suggested.
The screenshots you posted show Runbox 7 in vertical preview mode without message list wrapping, and that’s part of the reason some of the fields are truncated.
If you move the preview pane separator slightly to the left then each entry in the message list should wrap onto two lines, allowing you to see more of each field (see that attached screenshot for an example).
We look forward to continuing this discussion and make Runbox 7 even more excellent!