我正在尝试设置JavaMail以使用Postfix发送和接收电子邮件，CentOS7已安装在我的postfix开发框中。我已确认MAIL=/home/root/Maildir能够通过在终端中键入mail，然后返回，然后CentOS 7 terminal来显示收到的电子邮件，其中列出了所有收到的用户帐户电子邮件。但是当我以root用户身份登录并检查Javamail中收到的电子邮件时，我运行Javamail代码后没有新电子邮件，如下所述。 如何让import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
//Send a simple, single part, text/plain e-mail
public class TestEmail {
public void send(){
// SUBSTITUTE YOUR EMAIL ADDRESSES HERE!
String to = "root@localhost";
String from = "username@localhost";
// SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!
String host = "localhost";
// Create properties, get Session
Properties props = new Properties();
//http://docs.oracle.com/javaee/6/api/javax/mail/Session.html
// If using static Transport.send(),
// need to specify which host to send it to
props.put("mail.smtp.host", host);
// To see what is going on behind the scene
props.put("mail.debug", "true");
Session session = Session.getInstance(props);
try {
// Instantiate a message
Message msg = new MimeMessage(session);
//Set message attributes
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject("A new record was just added.");
msg.setSentDate(new Date());
// Set message content
msg.setText("This is a test of sending a " +
"plain text e-mail through Java.\n" +
"Here is line 2.");
//Send the message
Transport.send(msg);
}
catch (MessagingException mex) {
// Prints all nested (chained) exceptions as well
mex.printStackTrace();
}
}
}//End of class
发送smtp电子邮件？
这是我的班级：
TestEmail em = new TestEmail();
em.send();
我按如下方式致电课程：
DEBUG: JavaMail version 1.5.0-b01
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "localhost", port 25, isSSL false
220 localhost.localdomain ESMTP Postfix
DEBUG SMTP: connected to host "localhost", port: 25
EHLO localhost.localdomain
250-localhost.localdomain
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "10240000"
DEBUG SMTP: Found extension "VRFY", arg ""
DEBUG SMTP: Found extension "ETRN", arg ""
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: use8bit false
MAIL FROM:<username@localhost>
250 2.1.0 Ok
RCPT TO:<root@localhost>
250 2.1.5 Ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP: root@localhost
DATA
354 End data with <CR><LF>.<CR><LF>
Date: Mon, 5 Jan 2015 13:12:02 -0800 (PST)
From: username@localhost
To: root@localhost
Message-ID: <1738078707.0.1420492322780.JavaMail.username@localhost.localdomain>
Subject: A new record was just added.
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
This is a test of sending a plain text e-mail through Java.
Here is line 2.
.
250 2.0.0 Ok: queued as DB1249A618
QUIT
221 2.0.0 Bye
sessionID is: 0816C244BDBAAD890D82138DC3801962
运行上述代码时，eclipse控制台会生成以下日志：
{{1}}
答案 0 :(得分：1)
从日志Ok: queued as DB1249A618邮件被SMTP服务器正确接收。
所以问题可能是配置错误的服务器（可能是反垃圾邮件过滤器）或错误的邮件地址。
在这里查看https://serverfault.com/questions/485505/get-postfix-to-forward-roots-mail以检查您的服务器配置是否正确。