Google search results leading to google "This site may harm your computer"

Thanks for the notice.

Possibly because of the URL contained in the message and/or as appear to be in html format as composed initially under OE and the copied to another mail client.

Gmail support notice:
If our system flags a message as phishing, but you've validated the source from which the message originated, click the down arrow next to Reply at the top-right of the message pane, and select Report Not Phishing to let us know the message is legitimate. And if you receive a message that our phishing detection system doesn't pick up on, click Report Phishing to send a copy of the message to the Gmail Team.