Javax.mail経由でメールを送信してみてください。
Properties props = new Properties();
props.put("mail.smtp.Host", "xxxxx");
props.put("mail.smtp.port", "25");
props.put("mail.smtp.auth", "false");
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("xx", "xx");
}
});
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("xxxxx"));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("xxxxx"));
message.setSubject("Subject");
message.setText("Body");
Transport.send(message);
System.out.println("Done");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
例外をスローします
Exception in thread "main" Java.lang.RuntimeException: javax.mail.MessagingException: Could not connect to SMTP Host: srv-mail.imb.invention.com, port: 25;
nested exception is:
Java.net.SocketException: Network is unreachable: connect
at foo.SendMailTest.main(SendMailTest.Java:41)
Caused by: javax.mail.MessagingException: Could not connect to SMTP Host: xxx.xxxx.zzzzz.com, port: 25;
nested exception is:
Java.net.SocketException: Network is unreachable: connect
at com.Sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.Java:1961)
at com.Sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.Java:654)
at javax.mail.Service.connect(Service.Java:295)
at javax.mail.Service.connect(Service.Java:176)
at javax.mail.Service.connect(Service.Java:125)
at javax.mail.Transport.send0(Transport.Java:194)
at javax.mail.Transport.send(Transport.Java:124)
at foo.SendMailTest.main(SendMailTest.Java:36)
Caused by: Java.net.SocketException: Network is unreachable: connect
at Java.net.DualStackPlainSocketImpl.connect0(Native Method)
at Java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at Java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at Java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at Java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at Java.net.PlainSocketImpl.connect(Unknown Source)
at Java.net.SocksSocketImpl.connect(Unknown Source)
at Java.net.Socket.connect(Unknown Source)
at Java.net.Socket.connect(Unknown Source)
at com.Sun.mail.util.SocketFetcher.createSocket(SocketFetcher.Java:321)
at com.Sun.mail.util.SocketFetcher.getSocket(SocketFetcher.Java:237)
at com.Sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.Java:1927)
... 7 more
利用可能なサーバー:
C:\work\test>nc.exe xxx 25
220 xxx.zzz.aaaaaaa.com Microsoft ESMTP MAIL Service ready at Thu, 12 Sep 2013 15:10:45 +0300
pingも機能します。
同様の.netコードは期待どおりに機能します。
何がうまくいかないのか分かりません。
答えは次のとおりです。Java IPv6を好むが、当社ではIPv6に問題があります。プロパティの追加Java.net.preferIPv4Stack=true
問題を解決します。