crosspost

An electronic message posted to multiple newsgroups or forums simultaneously.

An instance of crossposting, or the post thus created.

To post (a message) to multiple newsgroups or forums simultaneously.

but it sounds like a rationalization to me. I'm cross-posting this to net.women to see how women feel about it.

To post an entry (in a book index or other index) such that no matter which word a user looks under, they will find the relevant entry (see examples).