Maybe someone can shed light on this. This morning I found 300 emails in my inbox, from various Mailer Systems, notifying that "my email could not be delivered", all from various sources and different styles. Some of them included the original email or the subject, which was essentially spam.

My PCs were turned off at the time all those error emails were generated and sent, so I doubt I have been virused or trojaned. The possibility is that someone is sending spam and putting a real email address (mine in this case) in the From: / Reply-To: fields. If blacklists and anti-spam filters are using and registering these fields, this would be a damn great way to either ruin someone’s address, or more likely, render those systems unusable by filling them from non-spammer data. Spoofing a From: / Reply-To: field is the easiest thing in the world, but I had never thought of this use. I now fear my e-mail address (which has been relatively spam-safe for years) will be blacklisted and ruined forever.

Anyone knows anything about this issue?

Links I’ve found about this:
http://www.ksinclair.com/Article536.htm