This is how to send a private message to a blogger whose Email address is not published in his/her profile. This may be useful in case you want to exchange Email addresses, however you do not want them to be shown to spammers, etc.
Most of the bloggers has the "Comment Notification Address" feature set in their blogs, it is an Email address, where you receive the contents of the new comments you receive on your own blog. So, you can now send a comment, and then delete it just after you send it. In such case it will obviously not be show, however it will be sent to the blog owner's Email.
Tags: Blog, Hack, Gr33n Data