Cypht has become Tiki's webmail:
https://doc.tiki.org/CyphtQuestion

Why Tiki picked Cypht over the more popular Roundcube:
https://doc.tiki.org/Roundcube-vs-CyphtQuestion

Cypht within Tiki has many even more advanced features:
https://doc.tiki.org/Email-filtersQuestion
https://doc.tiki.org/Calendar-Invitations-by-emailQuestion
https://doc.tiki.org/Email-folders-Tracker-FieldQuestion

Many more developments are planned for Cypht version 3.0:
https://github.com/cypht-org/cypht/milestone/4Question

This is further in the future, but I would like the system to learn from my manual operations, and propose things: https://doc.tiki.org/Machine-LearningQuestion

I urge you to join us!