remailers and multiple recipients

Can the remailers handle multiple recipients? If I list several addresses in the "Request-Remailing-To:" line, seperated by commas, will the remailer do what I would think, and send off to all of them? Anyone who knows the answer (either from experience, or because they run a remailer, or wrote the software), please tell me. I've been trying experimentally, unsuccesfully so far, but I'm not sure if that's just because I'm using the wrong syntax, or the wrong remailers.