Sun Microsystems 宣布發布JavaMail 1.4 版本。JavaMail API是讀取、撰寫、發送電子信息的可選包。我們可用它來建立如Eudora、Foxmail、MS Outlook Express一般的郵件用戶代理程序（Mail User Agent,簡稱MUA）。而不是像sendmail或者其它的郵件傳輸代理（Mail Transfer Agent，簡稱MTA）程序那樣可以傳送、遞送、轉發郵件。官方提到：The JavaMail 1.4 release includes many API improvements approved by the Java Community Process via JSR-919. It also includes improvements in MIME parsing performance and support for parsing and constructing Delivery Status Notifications