is EDMessage.framework thread safe?

Hey, I didn't see this anywhere in their FAQ and wanted to 开发者_开发问答know if EDMessage.framework [ http://www.mulle-kybernetik.com/software/EDFrameworks/ ] is thread safe. If it matters, I'd be sending out bulk quantities of html emails. I am currently sending each email one at a time on a non-main thread. Also, from the looks of the info on it its pretty old (by SO standards), so if anyone has a better framework in mind (that is thread safe) please tell. I am currently sending each email one at a time on a non-main thread.