cc:mail trivial DoS attack - self mailbombing.

[alan () MANAWATU GEN NZ (Alan Brown)]

This seems to work on most cc:mail installations

Send mail to postmaster@[x.x.x.x] where x.x.x.x is the IP address of the
server.

In most cases, the machine will mailbomb itself into the ground
with undeliverable mail messages.

For bonus points, use a bogus, undeliverable sender envelope and watch
it crash even faster.

In some cases, In some cases, postmaster () rDNS name will have the same effect, depending
how badly setup the server is.

Script kiddies may like to have fun by using a sender envelope belonging
to someone else. One case I've seen resulted in the machine sending over
5800 "postmaster: No such user" errors for one message sent to it.

AB