It would be great if Trojitá homepage had HTTPS/SSL support. I recommend Let's Encrypt certificates (https://letsencrypt.org/).
Sorry for a late response. Yes, you're right, it would be nice. I'll handle this when I reimage that VM.
Trojitá is no longer maintained, please switch to a maintained alternative like https://apps.kde.org/kmail2/ Sorry for the inconveniences.