What is this anti-spam algorithm? write an email filter alghoritm which recieves emails from any email servers (like pop3 servers) then checks every incoming email content and finds words like "link is:" "click here" then if there were these words in email content, for the word: "link is:" sends this text to the sender of email:"don't spam me" and if it finds the word of: "click here" it sends this text to the sender of email:"Hi, If you are a real human, please reply with the word “pass”. (Simply hit Reply, type “pass” as your response, and hit Send." Thanks.
A duff one if after deciding a message is spam it sends a reply to the spammer, (a) because it confirms to a spammer that an address is valid, if the message came from the spammer, which is unlikely (b) because if the message didn't come from a spammer or has a fake return address your reply is simply going into the ether, or more likely into the inbox of someone who had nothing to do with the spam. Best bet for spam is to ignore it silently. Don't let the spamtards know your email address is valid.