Stopping Spam With Linux
What is Spam?If you have used email at all you have seen spam: unsolicited and unwanted email. The way that email works means that it is very easy to send out bulk mailings at a very low cost. The cost is low because largely it is the receiver of the email that pays. If you read email on a dialup modem line or pay for your Internet connection, then in a real sense you are paying for the spam you get.
Why Can't the ISP Just Block it For Me?Often it is difficult for ISPs to block spam to everyone. This is because the ISPs do not know which email items you want to receive and which ones you do not. The ISP cannot predict in advance what email you have an expectation of getting and from where. It would also be inappropriate for ISPs to screen the content of the messages. There would be privacy issues. However, there are certain approaches that can be taken at the email server side. If you have recently installed Linux and are thinking of running your own email server, then you should carefully consider the problem of spam.