Java測試發送郵件的時候經常出現異常，檢查多次賬戶名密碼無誤后，依然出現如下圖錯誤： 之前不清楚，后面在網上得到提醒，我們所使用的smtp服務器使用的密碼與我們自身登錄網頁端郵箱的密碼是不一樣的，以163郵箱為例，當我們設置打開smtp服務時會要求我們設

下載地址：

下載1 封裝好的java郵件包,代碼調用示例 public static void main(String[] args) throws Exception {

FinderSendMail sendMail;

MailInfo mailInfo =new MailInfo();

mailInfo.setTitle("test title");

mailInfo.setFrom("xxx@163.com");

mailInfo.setHost("smtp.163.com");

mailInfo.setTo("xxx@gmail.com");

mailInfo.setUsername("xxx@163.com");

mailInfo.setPassword("xxx");

//mailInfo.setContentType("text/html");

mailInfo.setContent("welcome to 技術社區");

sendMail=new FinderSendMail(mailInfo);

sendMail.send();

} 就這么簡單調用，就發出去了， 依賴包 activition.jar,mail.jar, log4j.jar 如果你放在有JAVAEE.JAR 環境下 運行 會有一下錯誤問題 首次運行你可能會遇到以下的錯誤，所以note.txt文件就用來提供遇到的錯誤以及對應的解決方案 note.txt java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream

at javax.mail.Session.loadProvidersFromStream(Session.java:928)

at javax.mail.Session.access$000(Session.java:174)

at javax.mail.Session$1.load(Session.java:870)

at javax.mail.Session.loadResource(Session.java:1084)

at javax.mail.Session.loadProviders(Session.java:889)

at javax.mail.Session.(Session.java:210)

at javax.mail.Session.getDefaultInstance(Session.java:299)

at mail.SendMail.sendMail(SendMail.java:31)

at mail.SendMail.main(SendMail.java:50) Exception in thread "main"

解決方案:在myeclipse的安裝目錄下搜索javaee.jar,然后用壓縮軟件打開，刪除javax下的mail文件夾 java.lang.NoClassDefFoundError: com/sun/activation/registries/LogSupport

at javax.activation.MailcapCommandMap.(MailcapCommandMap.java:140)

at javax.activation.CommandMap.getDefaultCommandMap(CommandMap.java:61)

at javax.activation.DataHandler.getCommandMap(DataHandler.java:153)

at javax.activation.DataHand1、注冊一個網易郵箱，開通smtp服務，作為發送郵件的郵箱服務器 2、jar包準備commons-email-1.3.3.jar，activation.jar等，源碼有提供 3、準備工作 //設置smtp host,QQ郵箱郵件服務器為smtp.qq.com,此處為163 郵箱

private static final String HostName = "ler.getDataContentHandler(DataHandler.java:611)

at javax.activation.DataHandler.writeTo(DataHandler.java:315)

at javax.mail.internet.MimeUtility.getEncoding(MimeUtility.java:264)

at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1299)

at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2071)

at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:2039)

at javax.mail.Transport.send(Transport.java:119)

at mail.SendMail.sendMailNoValidate(SendMail.java:48)

at mail.SendMail.main(SendMail.java:96) Exception in thread "main"

解決方案:在myeclipse的安裝目錄下搜索javaee.jar,然后用壓縮軟件打開，刪除javax文件夾下的activation文件夾 javax.mail.SendFailedException: Sending failed;

nested exception is:

javax.mail.MessagingException: 503 Error: need EHLO and AUTH first !

at javax.mail.Transport.send0(Transport.java:219)

at javax.mail.Transport.send(Transport.java:81)

at com.asiainfo.bboss.sendmail.SendMailServiceImpl.sendMailNoValidate(SendMailServiceImpl.java:210)

at com.asiainfo.bboss.sendmail.SendMailServiceImpl.sendMail(SendMailServiceImpl.java:243)

at com.asiainfo.bboss.sendmail.SendMailServiceImpl.main(SendMailServiceImpl.java:261) 解決方案:props.put("mail.smtp.auth", "true");

javax.mail.SendFailedException: Sending failed;

nested exception is:

javax.mail.AuthenticationFailedException

at javax.mail.Transport.send0(Transport.java:219)

at javax.mail.Transport.send(Transport.java:81)

at com.asiainfo.bboss.sendmail.SendMailServiceImpl.sendMailNoValidate(SendMailServiceImpl.java:211)

at com.asiainfo.bboss.sendmail.SendMailServiceImpl.sendMail(SendMailServiceImpl.java:244)

at com.asiainfo.bboss.sendmail.SendMailServiceImpl.main(SendMailServiceImpl.java:262) 解決方案:?MyAuthenticator myauth = new MyAuthenticator(mailInfo.getUsername(),password);

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