Robert Boyle wrote:
At 05:37 AM 6/23/2005, you wrote:
Hi guys. I notice a large increase in recent weeks of ISP directed phishing - largely because of worms moving backward to using the user's own domain for the spam, but not just in the from: address.
I believe this started out as a "let's feel this out" or "wow, that worked, let's phish ISP's directly too". I now have several reports that point to this becoming a serious problem.
Old with a spark of new, but definitely a problem.
Anyone else dealing with this?
Due to the huge number of variants in the wild, our AV software can't keep up (probably nobody's can). Instead, we enabled a global rule which blocks any email from accounts such as billing, root, postmaster, antivirus, abuse, security, etc. which don't originate from our management IP space where our people work. As a result, we have stopped these phishing scams for our users dead in their tracks.
-Robert
We did as well, but we did not yet find a solution for legit bounces.. it naturally breaks that. It's a temporary solution to what I see that is going to become very big.