August 29th, 2007 | Published in Google Webmaster Central
First, a brief recap: In late 2005, we started emailing webmasters to let them know that their site is violating our Webmaster Guidelines and that we have temporarily removed some of their pages from our index. A few months ago we put these emails on hold due to a number of spoofed messages being sent from outside Google, primarily to German webmasters. Then, in mid-July, we launched Message Center in our webmaster console, which allows us to send messages to verified site owners.
While Message Center is great for verified site owners, it doesn't allow us to notify webmasters who aren't registered in Google's Webmaster Tools. For this reason, we plan to resume sending emails in addition to the Message Center notifications. Please note that, as before, our emails will not include attachments. Currently, the Message Center won't keep messages waiting if you haven't previously registered, but we hope to add that feature in the next few months. We'll keep you posted as things change.