The right choice would be by Fastmail to cooperate directly with Evolution, Thunderbird, K-Mail, Apple Mail and help them were needed. Most of those don't hand

The right choice would be by Fastmail to cooperate directly with Evolution, Thunderbird, K-Mail, Apple Mail and help them were needed. Most of those don't handle (catch-all) aliases correctly such as letting you compose with any aliases you're allowed to send from (without creating individual identities) or responding with the correct alias for the From address. They also have subpar search.