If you're already on the mmmEnglish mailing list then don't worry, I've already sent this to you, it's in your inbox.
如果你已经在美味英语的邮件列表中了的话，那么就不用担心，我已经发给你了，它现在就在你的收件箱中。
英语百科
Mailing list
（重定向自Mail list）
A mailing list is a collection of names and addresses used by an individual or an organization to send material to multiple recipients. The term is often extended to include the people subscribed to such a list, so the group of subscribers is referred to as "the mailing list", or simply "the list".