Internet Shopper Ltd's Mail Server Open relay bug.

Internet Shopper Ltd's Mail Server Open relay bug. I have been unable to make contact with Internet Shopper Ltd, and as this bug might easily be found accidently I have decide to make it public SUMMARY: Internet Shopper Ltd's Mail Server can be made to accept and handle mail for non-local sites...

ntmail3relay.txt

NTMail version 3 relay problem NTmail3 appears to have a small hole that allows anyone to use an NTmail3 server as a relay mail server. Basically here is how it works. NTmail3 is set to not allow relay either the TO or FROM address must be local JUCE a $500 antispamming add-on from the makers of...