Mutt releases version 2.0

I haven't used neomutt, but for what it's worth, normal mutt does also have a trash folder (now): http://www.mutt.org/doc/manual/manual.html#trash. There is also other features that got committed to mutt meanwhile that only used to be available with patches, like the sidebar (http://www.mutt.org/doc/manual/manual.html#intro-sidebar). So maybe its worth checking what you use in neomutt that is really only available in it... but you may have to use a upstream mutt, not whatever your Distro ships.