On Thursday 10 October 2002 12:00 pm, Daniel Goldin wrote: > I recently discovered that earthlink has been blocking emails from my > computer due to third party relay vulnerability. They sent me a long > automated email urging me to contact my systems administrator. The > last thing I want to be is a vehicle for spam, but I am my own > administrator and a non-programmer at that and have no idea how to > hack sendmail to fix this problem. > > Has anyone else faced this issue and found a solution? Thanks > beforehand for any help. The problem is (in most cases) that your server is using an open relay policy, which is by default disabled in the later sendmail distributions, and allows individuals (anyone) to come in and use your email server (without authentication usually), creating huge huge huge problems for yourself down the road.
There's a couple of solutions to this problem: A> Upgrade sendmail to a more recent version,as this closes the open relay problem. B> Install a more efficient MTA (qmail has always been a favorite of mine, and is rather painless to install if you have a little bit of knowledge). C> Edit the sendmail config files to close relays. If you do this though, you'll probably find a lot of your own mail is getting rejected (stuff that shouldn't be). Your best bet is to go with option B as sendmail is constantly being hacked for this or that or something else. -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
