Can I disable signing of messages to unknown users?

There’s currently no option for this in the plugin’s settings screens, but you can override the filters from your own functions.php file if you wish. Might be worth considering adding this as an option. I’d accept patches if you have the capability to write one.

Thanks. I’m no PHP developer, but I’ll play around with it.

@bricehughes, please download and test the pre-release version of 0.5.0, which adds this option, and let me know if it does what you were hoping for.