Here’s the text of the email:
Dear Yahoo! Mash member,
Thank you for trying out our Mash Beta service. We hope you had fun with it.
Please note that we will shut down Mash on September 29, 2008. As a result, your current profile on Mash will no longer be available. We strongly recommend that you return to http://mash.yahoo.com and copy the content that you wish to save onto a separate document.
For a list of FAQs, please refer to the Mash Help Page.
Thanks for trying out Mash!
Yahoo! Community Manager