我正在尝试从Android应用程序中发送电子邮件。我使用gmail smtp服务器制作了一个功能正常的演示，但是迁移到使用Microsoft Exchange 2013邮件服务器变得非常困难。我得到以下异常跟踪（我已经匿名化了服务器名称和IP地址）：
10-21 10:21:00.162 14167-14546/no.uib.jmi053.tefapplication W/System.err: javax.mail.MessagingException: Exception reading response;
10-21 10:21:00.162 14167-14546/no.uib.jmi053.tefapplication W/System.err: nested exception is:
10-21 10:21:00.162 14167-14546/no.uib.jmi053.tefapplication W/System.err: javax.net.ssl.SSLException: Read error: ssl=0xb895bf18: I/O error during system call, Connection reset by peer
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1611)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1369)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at javax.mail.Service.connect(Service.java:288)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at no.uib.jmi053.tefapplication.io.mail.GmailSender.send(GmailSender.java:109)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at no.uib.jmi053.tefapplication.io.mail.AsyncSendTask.doInBackground(AsyncSendTask.java:70)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at no.uib.jmi053.tefapplication.io.mail.AsyncSendTask.doInBackground(AsyncSendTask.java:12)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:288)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.lang.Thread.run(Thread.java:818)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: Caused by: javax.net.ssl.SSLException: Read error: ssl=0xb895bf18: I/O error during system call, Connection reset by peer
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.android.org.conscrypt.NativeCrypto.SSL_read(Native Method)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.read(OpenSSLSocketImpl.java:728)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:110)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.io.InputStream.read(InputStream.java:162)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:149)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at java.io.BufferedInputStream.read(BufferedInputStream.java:234)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:88)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1589)
10-21 10:21:00.172 14167-14546/no.uib.jmi053.tefapplication W/System.err: ... 12 more
在咨询客户端之后，问题似乎是我试图以非标准方式连接到他们的服务器，或者以服务器无法识别的方式连接到他们的服务器。我不熟悉Microsoft Exchange，我不太确定如何以可以使用的方式连接到服务器。
这是我的发件人类：
package no.uib.jmi053.tefapplication.io.mail;
import com.sun.mail.smtp.SMTPTransport;
import java.util.Date;
import java.util.Properties;
import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
/**
* Created by JoaT Development on 02.10.2015.
*
* Handles sending an email from Gmail-client.
*/
public class GmailSender{
private String _user;
private String _pass;
private String[] _to;
private String _from;
private String _port;
private String _sport;
private String _host;
private String _subject;
private String _body;
private boolean _auth;
private boolean _debuggable;
private Multipart _multipart;
public GmailSender() {
_host = "mail.company-name.com"; // default smtp server
_port = "443"; // default smtp port
_sport = "443"; // default socketfactory port
_user = ""; // username
_pass = ""; // password
_from = ""; // email sent from
_subject = ""; // email subject
_body = ""; // email body
_debuggable = false; // debug mode on or off - default off
_auth = true; // smtp authentication - default on
_multipart = new MimeMultipart();
// There is something wrong with MailCap, javamail can not find a handler for the multipart/mixed part, so this bit needs to be added.
MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();
mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
CommandMap.setDefaultCommandMap(mc);
}
public GmailSender(String user, String pass) {
this();
_user = user;
_pass = pass;
}
public boolean send() throws Exception {
Properties props = _setProperties();
if(!_user.equals("") && !_pass.equals("") && _to.length > 0 && !_from.equals("") && !_subject.equals("") && !_body.equals("")) {
Session session = Session.getInstance(props, null);
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(_from));
InternetAddress[] addressTo = new InternetAddress[_to.length];
for (int i = 0; i < _to.length; i++) {
addressTo[i] = new InternetAddress(_to[i]);
}
msg.setRecipients(MimeMessage.RecipientType.TO, addressTo);
msg.setSubject(_subject);
msg.setSentDate(new Date());
// setup message body
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(_body);
_multipart.addBodyPart(messageBodyPart);
// Put parts in message
msg.setContent(_multipart);
// send email
SMTPTransport t = (SMTPTransport)session.getTransport("smtps");
t.connect(_host, _user, _pass);
t.send(msg);
t.close();
return true;
} else {
return false;
}
}
public void addAttachment(String filePath, String filename) throws Exception {
BodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(filePath);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(filename);
_multipart.addBodyPart(messageBodyPart);
}
private Properties _setProperties() {
Properties props = new Properties();
props.put("mail.smtp.host", _host);
if(_debuggable) {
props.put("mail.debug", "true");
}
if(_auth) {
props.put("mail.smtp.auth", "true");
}
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", _host);
props.put("mail.smtp.port", _port);
props.put("mail.smtp.ssl.enable", "true");
props.put("mail.smtp.ssl.trust", _host);
props.setProperty("mail.smtp.quitwait", "false");
return props;
}
// the getters and setter
public void setBody(String _body) {
this._body = _body;
}
public void setTo(String[] toArr) {
// TODO Auto-generated method stub
this._to=toArr;
}
public void setFrom(String string) {
// TODO Auto-generated method stub
this._from=string;
}
public void setSubject(String string) {
// TODO Auto-generated method stub
this._subject=string;
}
}
这是来自AsyncTask，它来自：
sender.setSubject("Reimbursement for " + userName + " " + startDate);
sender.setBody("This mail has been sent from a Travel Expense Form Application. " +
"It contains a single expense for " + userName + " " + startDate);
sender.addAttachment(formPath, userName + " " + startDate + ".xls");
} else {
sender.setSubject("Travel expense form for " + userName + ": " + startDate + " - "
+ endDateString);
sender.setBody("This mail has been sent from a Travel Expense Form Application. " +
"It contains a travel for " + userName + " with route " + travelRoute +
": " + startDate + " - " + endDateString);
sender.addAttachment(formPath, userName + ": " + startDate + " - " + endDateString +
".xls");
}
for (int i = 0; i < imagePathList.size(); i++) {
sender.addAttachment(imagePathList.get(i), findNameFromPath(imagePathList.get(i)));
}
sender.setFrom(sendAddress);
String[] recipients = {toAddress, sendAddress};
sender.setTo(recipients);
success = sender.send();
我之前尝试过使用javax.mail.Authenticator并在发送时进行身份验证，但无济于事。
我很欣赏这方面的任何意见，因为我已经彻底坚持了这个问题很长一段时间了。
答案 0 :(得分：0)
抱歉，我在“答案”中发帖。没有足够的分数来评论你的问题。
默认情况下，Exchange 2013在上次安装时没有为466上的SMTPS监听，它必须先构建。这会导致您的Microsoft Exchange连接产生什么结果？
openssl s_client -starttls smtp -connect example.com:465
只需验证您可以先使用SMTPS获得正确的响应。
答案 1 :(得分：0)
我遇到了类似的问题，可能是网络问题或防火墙问题。
从日志中我可以看到ip是：00.000.00.000所以可能你没有连接。
您可以尝试使用BackgroundMailLibrary
等帮助库但它看起来像网络，而不是代码。
需要注意的其他事项是，您已允许您拥有其他邮件客户端的帐户