為了遏制網(wǎng)絡(luò)中大量存在的垃圾郵件，需要對網(wǎng)絡(luò)中傳輸?shù)泥]件信息進(jìn)行獲取，以實
現(xiàn)垃圾郵件的恰當(dāng)過濾。本文通過分析郵件傳輸?shù)膬煞N方式，討論了與郵件信息獲取相關(guān)的若干問題，主要包括網(wǎng)絡(luò)數(shù)據(jù)包的捕獲與重組、基于SMTP/POP3 協(xié)議的郵件信息獲取技術(shù)以及基于HTTP 協(xié)議的Webmail 郵件信息獲取技術(shù)。實際應(yīng)用表明，本文所討論的郵件信息獲取技術(shù)具有較大實用價值，為實現(xiàn)垃圾郵件的過濾奠定了重要的技術(shù)基礎(chǔ)。
關(guān)鍵詞：簡單郵件傳輸協(xié)議；郵局協(xié)議3；Webmail 郵件；網(wǎng)絡(luò)數(shù)據(jù)包捕獲；郵件信息獲取
Abstract: To reject spam on the internet, mail information transmitted on the network should be captured in order to filter the spam properly. By analyzing two typical ways through which e-mails are transferred, this paper discussed some issues about mail information extraction, including capturing and reordering of the network packages, extracting of mail information based on SMTP/POP3 and HTTP. Practical application indicates that those mail information extraction techniques have certain practical value and founds a firm technology base for spam filtering.
Key words: SMTP, POP3, Webmail, Network package capture, Mail information extraction