When I compose a message in my e-mail client NeoMutt my editor Neovim inserts automatic line breaks after about 73 characters. I don’t like it at all.
Thankfully you can easily fix this by adding a few parameters to the
$EDITOR for your NeoMutt configuration file:
set editor="vim +':set textwidth=0' +':set wrapmargin=0' +':set wrap'"
This should work fine with Mutt and Vim as well.