If you need more e-mails for your customers, and a plugin that does that job? Look no more, this plugin is really good, and super easy to use. Good code, and super support! Recommended :)
I love the Multiple Email Recipients plugin! Especially as I can break the multiple emails by stock categories. It was such an easy solution that I thought was going to require API for. This is perfect if you have multiple stock from varying vendors and want to streamline the fulfilment process. The support I received was really quick too, not that it was needed for the plugin, as it was really a question.