Allow custom mail headers
Allow custom mail headers

synlay/ChicagoBoss,powermedia/ChicagoBoss,uselessd/ChicagoBoss,lamptt/ChicagoBoss,lamptt/ChicagoBoss,danikp/ChicagoBoss,7i11/ChicagoBoss,danikp/ChicagoBoss,7i11/ChicagoBoss,uselessd/ChicagoBoss,powermedia/ChicagoBoss,yunkai/ChicagoBoss,solatis/ChicagoBoss,synlay/ChicagoBoss,frkarl/ChicagoBoss,ChicagoBoss/ChicagoBoss,frkarl/ChicagoBoss,ChicagoBoss/ChicagoBoss,aherranz/ChicagoBoss,yunkai/ChicagoBoss,aherranz/ChicagoBoss,solatis/ChicagoBoss