Mu4e communicates with the mu backend through an s-expression based protocol [1], so in principle any other backend that implemented the protocol could work wit

Mu4e communicates with the mu backend through an s-expression based protocol [1], so in principle any other backend that implemented the protocol could work with mu4e. Not aware of anyone having written an alternate backend though. [1] http://manpages.ubuntu.com/manpages/precise/man1/mu-server.1.html http://manpages.ubuntu.com/manpages/precise/man1/mu-server.1...