We have just been used as a smtp relay for one of the US spam companies and it crashed one of our mail servers, the service remained unaffected as our backup systems took over but we use sendmail and I cannot seem to find out how to stop us from being used in this fashion.
I know this is not the correct list for this sort of thing but I need some expert advice as our software suppliers don't know how to stop it.
As a general warning to everyone out there we need to protect our systems from these people who are starting to use us all to deliver their mail for them without paying us a penny.
hi. question: do you need to relay mail anyway? if not, reconfigure sendmail not to relay mail anymore. we did include code to stop sendmail from relaying on our own system, i am willing to forward you the code fragment... you should compile it yourself though. its the most effective way i know of. you can also achieve this by editing sendmail.cf as far as i know, yet i am not an expert at the config file... i am more the coder type of guy :) sincerely jens knoell twinwave ingelheim (jens@twinwave.net)