如何使用java代码检查邮件是否未发送
我正在使用以下代码发送邮件
public class Mail
{
public static void main(String[] args)
{
String[] to={"abcd@xyz.co"};
String[] cc={"pqrs@xyz.com"};
String subject = "Subject";
String body = "This is Body....!!";
Mail.sendMail("From@gmail.com","Password","smtp.gmail.com","465","true",
"true",true,"javax.net.ssl.SSLSocketFactory","false",to,cc,
subject,body);
}
public synchronized static boolean sendMail(String userName,String passWord,String host,String port,String starttls,String auth,boolean debug,String socketFactoryClass,String fallback,String[] to,String[] cc,String subject,String text)
{
Properties props = new Properties();
//Properties props=System.getProperties();
props.put("mail.smtp.user", userName);
props.put("mail.smtp.host", host);
if(!"".equals(port))
props.put("mail.smtp.port", port);
if(!"".equals(starttls))
props.put("mail.smtp.starttls.enable",starttls);
props.put("mail.smtp.auth", auth);
if(debug){
props.put("mail.smtp.debug", "true");
}else{
props.put("mail.smtp.debug", "false");
}
if(!"".equals(port))
props.put("mail.smtp.socketFactory.port", port);
if(!"".equals(socketFactoryClass))
props.put("mail.smtp.socketFactory.class",socketFactoryClass);
if(!"".equals(fallback))
props.put("mail.smtp.socketFactory.fallback", fallback);
try
{
Session session = Session.getDefaultInstance(props, null);
session.setDebug(debug);
MimeMessage msg = new MimeMessage(session);
msg.setText(text);
msg.setSubject(subject);
msg.setFrom(new InternetAddress("From@gmail.com"));
for(int i=0;i<to.length;i++){
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to[i]));
}
for(int i=0;i<cc.length;i++){
msg.addRecipient(Message.RecipientType.CC, new InternetAddress(cc[i]));
}
msg.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect(host, userName, passWord);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();
return true;
}
catch (Exception mex)
{
mex.printStackTrace();
return false;
}
}
代码工作正常,消息已发送。但是如果消息没有被发送(比如当我试图发送到时),我想设置一个标志(比如flag=false)abcd@xyz.com因为它不是有效的邮件Id)。如果有人能帮我,我会非常感激的
提前谢谢
# 1 楼答案
创建
Session
时应传递Authenticator
对象authenticator—用于在需要用户名和密码时回调应用程序的authenticator对象
请查找带有解释的工作示例-Link
# 2 楼答案
您可能需要在
msg.setFrom()
中放入一封实际的电子邮件,并检查其收件箱中的Non delivery report大多数服务器在放弃之前会多次尝试发送您的电子邮件,因此您无法立即确定该电子邮件是否有效