What is your favorite email client?

For me it's EssentialPIM. It has everything a customer like Outlook has to offer. But it is much cheaper (for the paid version), offers a lot of synchronization interfaces (Google, Microsoft, ...) including its own secure cloud. It manages encrypted mails with PGP keys, it interfaces with my antivirus. But above all its interface is complete, with an equally synchronizable calendar (Google for my part) with alerts, management of notes, task lists, contacts, passwords, widgets on the desktop ...

It is also available on Android and IOS, which allows me to stay in sync and keep my habits.

I ended up buying the Pro version and I am really satisfied.