Try with managesieve REPL in src/managesieve.rs:
cargo run --bin managesieve-client ~/.config/meli/config.toml
"accountname"
rfc5804 <https://www.rfc-editor.org/rfc/rfc5804.html>
So far only the connection is implemented, and using the
testing/manage_sieve binary you can get a shell to a managesieve server.
The managesieve interface will be used in the UI from a plugin, but the
plugin's interface isn't implemented yet.