Signing Return Path Addresses with Exim

I have been receiving a fair amount of Spam from an e-mail forwarder. They are unwilling to correct their problems. Much of this Spam is in the form of bounce notifications. Attempting to reject other Spam resulted in more notifications. To control this Spam I implemented signed return path addresses. As a side benefit, I am also rejecting bogus notifications… Continue reading Signing Return Path Addresses with Exim