What cross-platform mail client do you recommend?

Question

Email

There is a need:
- use of several mailboxes, naturally with different accounts, passwords;
- work at different workplaces and with different operating systems (Windows, OS X, Linux).
What convenient, reliable, secure and easy (in terms of resources and development) mail service client can you recommend?

Answer 1

Mozilla Thunderbird?

Answer 2

Thunderbird. The only, as they say. I don't know anything else that would work here and there and over there. You just need to remember to set up "Sent", "Templates", "Drafts" on the server, otherwise she strives to put them in a local folder.