spam filtering services

Spam Filtering Services

Spam filtering services offered by many retail isps, commercial online spam-filtering services (such as spamcop), mda-based procmail scripts, or packages like spamassassin, are all examples of on-network filtering.
Stock Spam: A type of securities fraud in which victims are tricked into buying nonperforming stocks for the ultimate benefit of the fraudsters.
Spammers send out emails to websites that they find, after collecting (called 'harvesting') emails from the web site.
Blacklist: a list of known spammers and spammers email addresses built into most spam blockers.
As horrible as spam is, it must be profitable or else it would not be so prevalent.
If you run a website and have access to its web server logs, you can often find evidence of the activities of spambots -- they frequently leave odd signatures in the http-user-agent field.
Traceroute is often useful for tracing down the upstream providers of spammers who own their own net blocks.
Spam filters can be deployed on the network or on your computer.
Filters are not perfect, and can make false-positive errors (detaining e-mails that aren't spam) and false-negative errors (passing e-mails that are spam).
You should never respond to or unsubscribe from spam email, you should use multiple email addresses, and you should not give your email address to companies you do not trust.
If you receive multiple spam emails, report it to spamcop(dot)net.
Simply create an account with them and send your spam report to them.