java发送邮件获取退信
时间: 2023-10-19 19:11:00 浏览: 111
Java发送邮件时,如果出现退信,可以通过设置回调函数来获取退信信息。
在使用JavaMail发送邮件时,需要创建一个实现了TransportListener接口的类,该类中的messageDelivered方法会在邮件成功发送后被调用,而messageNotDelivered方法会在出现退信时被调用。在messageNotDelivered方法中,可以获取到退信的详细信息,例如退信原因、收件人地址等。
下面是一个示例代码:
```java
public class MailListener implements TransportListener {
@Override
public void messageDelivered(TransportEvent event) {
// 邮件发送成功
System.out.println("Mail delivered successfully.");
}
@Override
public void messageNotDelivered(TransportEvent event) {
// 邮件发送失败,获取退信信息
System.out.println("Mail not delivered.");
Address[] addresses = event.getInvalidAddresses();
if (addresses != null) {
for (Address address : addresses) {
System.out.println("Invalid address: " + address);
}
}
addresses = event.getValidUnsentAddresses();
if (addresses != null) {
for (Address address : addresses) {
System.out.println("Valid unsent address: " + address);
}
}
}
@Override
public void messagePartiallyDelivered(TransportEvent event) {
// 邮件部分发送成功
System.out.println("Mail partially delivered.");
}
}
```
在发送邮件时,需要将该回调函数设置给Transport对象:
```java
Transport transport = session.getTransport();
transport.addTransportListener(new MailListener());
transport.connect();
transport.sendMessage(message, message.getAllRecipients());
```
这样,当邮件发送出现退信时,就会调用MailListener中的messageNotDelivered方法,并打印出退信相关的信息。