We are running an exchange server 2010 in the datacenter. Different company's are on the same exchange server.
the exchange server has only 1 public ip.
now company x has been spamming and the exchange ip adress is now on a blacklist.
also resulting that the other company's cannot email anymore.
is there a way to prevent this? can exchange use multiple ip's? ex, for each company or is there another great solution?