a anti spam

A Anti Spam

Hotmail has a user reporting feature, the moment hotmail users spot a spam email, they are encouraged to report it back to hotmail.
This database is often referred to by microsoft's email products for anti-spamming.
In the most general case, the sender of an e-mail message usually transfers it from his computer (using his mail client) to a mail transfer agent (MTA) within his provider's domain.
This MTA will then transfer the message to a mail exchanger (MX) for the recipient's domain, identified via a DNS lookup.
The MX usually passes the message to a mail delivery agent (MDA) for pickup by the recipient (via her computer and mail client).
One set of statistics shows that as many as 4 of every 10 spam items come from U.
addresses.
There are also several received: fields in the header of every message.
Probe messages are evidence of a dictionary attack (or "directory harvest attack" or "mx probe") in which the spammer sends probe messages to a large number of e-mail addresses (some of which may be guesses) and prunes out those that are rejected by the mx.
POP (post office protocol) is a protocol defined in IETF RFC 1939 (also known as STD53) that can be used by mail clients to pick up e-mail messages from a mail delivery agent.

A Anti Spam