Currently building an encrypted email client and I'm looking for feedback on features.
One feature that's about 90% complete is compliment to spam filters. it gives you the ability to Delete an email and purge all emails from the server that was sent from that sender. It also blocks it going forward. So it sanitized at the client level and server level. Right now I'm figuring out how to get it to work with gmail overcomplicated folder system, but I'm close. Since i'm just building a client which means I can't do nothing about sanitizing emails on the server level, but It will at least be able to clear out inboxes faster. For example I tested an sender (linkedin) that had about 1100 emails on the server. I selected one email, then purged and it deleted all 1100 emails.
What other features should an email client have?