On Tue, Dec 15, 2009 at 3:09 PM, <vi...@wlcr.net> wrote: > > I just couldn't figure out why Postfix says the email > was possibly sent by us???
The receiving server accepted the message before attempting to reject it. As a result it likely bounced based on the email address pointing to your domain. That address was forged. This is known as backscatter spam. The receiving server should not have rejected it after it had made a decision to receive the email. http://www.postfix.org/BACKSCATTER_README.html You may wish to consider adding SPF records for your domain. These won't necessarily stop people forging mail as being from your domain, but will make it less attractive. Russell.
