No, it appears to come from Google. Here's part of the message
Site is listed as suspicious - visiting this website may harm your computer.
Part of this site was listed for suspicious activity 2 time(s) over the past 90 days.
What happened when Google visited this site?
Of the 1 pages that we tested on the site over the past 90 days, 1 page(s) resulted in malicious software being downloaded and installed without user consent. The last time that Google visited this site was on 2009-07-10, and the last time that suspicious content was found on this site was on 2009-07-10.
Malicious software is hosted on 3 domain(s), including (specifics removed).
3 domain(s) appear to be functioning as intermediaries for distributing malware to visitors of this site, including (specifics removed).
This site was hosted on 1 network(s) including AS16557 (COLOSOLUTIONS).
[edited by: encyclo at 4:33 pm (utc) on July 27, 2009]
[edit reason] removed specific references to malware sites [/edit]