JavaMail再體驗－Jemmy Walker

　　今天狀況還真不少，也更了解JavaMail，曾因發Mail中文出現亂碼，經由客戶提供sample，從純文字改以HTML方式發送，果然OK。

Properties props = new Properties();
props.put("mail.transport.protocol", "smtp");

Session session = Session.getDefaultInstance(props);
session.setDebug(this.debug);
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(this.from));

msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(this.recipients));
msg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(this.copyTos));
msg.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(this.blindCopyTo));
msg.setSubject(mailSubject,"UTF-8"); // 主旨轉UTF-8

Multipart mp = new MimeMultipart();
MimeBodyPart mbp = new MimeBodyPart();
mbp.setText(this.mailContent, "text/html;charset=UTF-8");
mp.addBodyPart(mbp);

msg.setContent(mp);
msg.setContent(this.mailContent, "text/html;charset=UTF-8");
msg.setText(this.mailContent);
msg.setSentDate(new Date());
Transport.send(msg);

　　從上面看到，mailContent被設置了三次：MimebodyPart的setText、MimeMessage的setContent和MimeMessage的setText。後來試出上述灰色字根本都不需要。只需setContent指定html的charset編碼，就不會出現亂碼。

　　而Transport.send為何也被灰色掉。透過Internet寄出可以，可是要發給Lotus Notes的Users就有問題了，原因不知為何就是被擋，還是循回老方法，透過Session取得Transport來發送就可以work：

Transport transport = session.getTransport("smtp");
transport.connect(this.host, "", ""); // this.username, this.password);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();