垃圾郵件的過濾方法
這(zhe)種(zhong)過濾(lv)(lv)器(qi)通常已經(jing)安裝在電子郵(you)(you)件(jian)(jian)客戶端軟(ruan)件(jian)(jian)或郵(you)(you)件(jian)(jian)服務器(qi)上。其原理是(shi)過濾(lv)(lv)軟(ruan)件(jian)(jian)檢查郵(you)(you)件(jian)(jian)的發(fa)信人、標(biao)題、正文內容,以(yi)及郵(you)(you)件(jian)(jian)中(zhong)出現的鏈接和域名,甚至電話號(hao)碼。當發(fa)現帶有明顯廣告性質,或經(jing)常出現已知垃圾郵(you)(you)件(jian)(jian)的典型(xing)特(te)征(zheng),則給這(zhe)封郵(you)(you)件(jian)(jian)打一定(ding)的垃圾郵(you)(you)件(jian)(jian)特(te)征(zheng)分數。當分數達(da)到(dao)一定(ding)數值時,郵(you)(you)件(jian)(jian)將被標(biao)志為垃圾郵(you)(you)件(jian)(jian),直(zhi)接過濾(lv)(lv)到(dao)垃圾郵(you)(you)件(jian)(jian)文件(jian)(jian)夾。