无法解析头创建MIME消息

Question

我尝试发送邮件只有我自己，不出去或者通过intertubes的基础上，Apache NNTP API。所涉及的特定类需要一个NNTP message并试图将其解析为一个普通的MIME类型的消息像这样：

package net.bounceme.dur.nntp; 

import java.util.Arrays; 
import java.util.Enumeration; 
import java.util.List; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import java.util.Properties; 
import javax.mail.Address; 
import javax.mail.Header; 
import javax.mail.Message; 
import javax.mail.MessagingException; 
import javax.mail.NoSuchProviderException; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeMessage; 

public class MessageSender { 

    private final static Logger LOG = Logger.getLogger(MessageSender.class.getName()); 
    private String header; 
    private String body; 
    private Properties p; 
    private Session session; 
    private MimeMessage message; 

    private MessageSender() { 
    } 

    public MessageSender(Properties p, String... s) throws Exception { 
     header = s[0]; 
     body = s[1]; 
     this.p = p; 
     populate(); 
    } 

    private void populate() throws Exception { 
     String lines[] = header.split("\\n"); 
     session = Session.getDefaultInstance(p, null); 
     message = new MimeMessage(session); 
     LOG.fine("\n\n\n\nnew message************\n\n\n\n"); 

     for (String s : lines) { 
      if (!s.contains("comp.lang.java.help")) { 
       message.addHeaderLine(s); 
      } 
     } 
     message.setContent(message, body); 
     String recipient = p.getProperty("recipient"); 
     message.setRecipients(Message.RecipientType.TO, 
       InternetAddress.parse(recipient)); 
     try { 
      send(); 
     } catch (javax.mail.internet.ParseException e) { 
      LOG.warning(e.toString()); 
     } catch (com.sun.mail.smtp.SMTPAddressFailedException e) { 
      LOG.warning(e.toString()); 
      List<Address> addresses = Arrays.asList(message.getAllRecipients()); 
      for (Address a : addresses) { 
       LOG.info(a.toString()); 
      } 
     } 
    } 

    private void send() throws Exception { 
     String protocol = p.getProperty("protocol"); 
     String host = p.getProperty("host"); 
     int port = Integer.valueOf(p.getProperty("port")); 
     String username = p.getProperty("username"); 
     String password = p.getProperty("password"); 
     Transport transport = session.getTransport(protocol); 
     LOG.log(Level.FINE, "{0}{1}{2}{3}{4}", new Object[]{protocol, host, port, username, password}); 
     Enumeration enumOfHeaders = message.getAllHeaders(); 
     while (enumOfHeaders.hasMoreElements()) { 
      Header h = (Header) enumOfHeaders.nextElement(); 
      LOG.log(Level.FINE, "\n\n\nHEADER\n{0}\n{1}", new Object[]{h.getName(), h.getValue()}); 
     } 
     transport.connect(host, port, username, password); 
     transport.sendMessage(message, message.getAllRecipients()); 
    } 
} 

但我在使用的头麻烦：

init: 
Deleting: /home/thufir/NetBeansProjects/apache_nntp/build/built-jar.properties 
deps-jar: 
Updating property file: /home/thufir/NetBeansProjects/apache_nntp/build/built-jar.properties 
Compiling 1 source file to /home/thufir/NetBeansProjects/apache_nntp/build/classes 
compile: 
run: 
200 Leafnode NNTP Daemon, version 1.11.8 running at localhost (my fqdn: dur.bounceme.net) 
GROUP comp.lang.java.help 
211 35 3 37 comp.lang.java.help group selected 
HEAD 3 
221 3 <7e60dce5-09d7-4cee-bbc1-137207f03dd0@googlegroups.com> article retrieved - head follows 
BODY 3 
222 3 <7e60dce5-09d7-4cee-bbc1-137207f03dd0@googlegroups.com> article retrieved - body follows 
Feb 24, 2013 3:05:04 AM net.bounceme.dur.nntp.MessageSender populate 
WARNING: javax.mail.internet.ParseException: Expected '/', got wrote 
HEAD 4 
221 4 <kfpdt3$5g9$1@dont-email.me> article retrieved - head follows 
BODY 4 
222 4 <kfpdt3$5g9$1@dont-email.me> article retrieved - body follows 
Exception in thread "main" javax.mail.SendFailedException: Invalid Addresses; 
    nested exception is: 
    com.sun.mail.smtp.SMTPAddressFailedException: 450 4.1.8 <markspace@nospam.nospam>: Sender address rejected: Domain not found 

    at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1863) 
    at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1119) 
    at net.bounceme.dur.nntp.MessageSender.send(MessageSender.java:80) 
    at net.bounceme.dur.nntp.MessageSender.populate(MessageSender.java:54) 
    at net.bounceme.dur.nntp.MessageSender.<init>(MessageSender.java:35) 
    at net.bounceme.dur.nntp.ArticleReader.<init>(ArticleReader.java:28) 
    at net.bounceme.dur.nntp.Driver.<init>(Driver.java:13) 
    at net.bounceme.dur.nntp.Driver.main(Driver.java:17) 
Caused by: com.sun.mail.smtp.SMTPAddressFailedException: 450 4.1.8 <markspace@nospam.nospam>: Sender address rejected: Domain not found 

    at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1730) 
    ... 7 more 
Java Result: 1 
BUILD SUCCESSFUL (total time: 6 seconds) 

现在，我明白，发件人没有域名。尽管如此，我想继续发送消息。我需要更改发件人吗？我想尽可能少地使用标题。

如果有更好的方法来转换NNTP - > MIME信息我当然愿意听听建议。我已经放弃了新闻组标题，因为这似乎有问题，原因我不明白。基本上，我只是不知道如何解析这些头，以便他们创建一个有效的消息发送。

Answer 1

是的，你需要修复发件人信息。这个问题不是（完全）你的代码。您的MTA拒绝电子邮件。 Sendmail通常配置为不允许出现无效的“发件人”地址。在这种情况下，它告诉你，“nospam.nospam”的DNS查找失败。

您的信封应反映，而不是试图利用网上文章海报的地址的类似news2mail@myhost.org发件人。

有多个usenet新闻可用的电子邮件网关;你可能想看看使用其中的一个而不是滚动你自己的。