outbound/todo: update to es6 classes (#2233)
outbound/todo: update to es6 classes (#2233)

updates #2133
haraka/Haraka,msimerson/Haraka,msimerson/Haraka,smfreegard/Haraka,haraka/Haraka,msimerson/Haraka,haraka/Haraka,smfreegard/Haraka,haraka/Haraka,smfreegard/Haraka,smfreegard/Haraka,msimerson/Haraka