Problem with emailing something from microsoft word 2007?

I emailed a regular microsoft word document by attaching the file to an email. When I tried to open it at school today it says that it is zipped and that it is a docx file? Anyone know what this is about? Thanks
Problem with emailing something from microsoft word 2007?
"docx" is one of the new file formats used for Word 2007 documents. Previous versions of Word used the "doc" format.





Is it possible that the computer at school is not using Word 2007 and that's why it won't open? If so, then here is the Microsoft How-To page on how to "Share Word 2007 Documents With People Who Are Using Previous Versions of Word":


http://office.microsoft.com/en-us/word/H...
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