我基本上想使用SMTPClient，MailAddress和MailMessage类通过C＃程序发送电子邮件。
与gmail等兼容，但我想使用其他SMTP服务器。
这是我的C＃代码示例：
SmtpClient smtpclient = new SmtpClient();
smtpclient.Host = "STMPserver";
smtpclient.Port = 465;
NetworkCredential myCredentials = new NetworkCredential("username","password");
smtpclient.Credentials = myCredentials;
smtpclient.EnableSsl = true;
MailAddress mailaddressfrom = new MailAddress("email", "sendername");
MailAddress mailaddressto = new MailAddress("email", "receivername");
MailMessage message = new MailMessage(mailaddressfrom, mailaddressto);
smtpclient.Send(message);
我没有得到的是，我通过Android电子邮件应用程序获取了信息，并且为SMTPserver，端口号，用户名，密码输入了完全相同的功能...
我的手机可以正常工作，但是程序超时。
我可能没有提供足够的信息，或者有可能在SMTP服务器之前有一个代理，实际上我没有任何想法，但是我真的很困惑。我还在cmd提示符下做了tracert，结果发现我无法访问所需的SMTP服务器。任何帮助，将不胜感激。
最佳答案
在以下链接中添加3个jar至您的Android项目
http://javamail-android.googlecode.com/files/mail.jar，activation.jar，additional.jar
如何添加外部罐子
https://stackoverflow.com/a/6859020/28557
运行该项目，并检查您的收件人邮件帐户中的邮件。干杯！！
希望这可以帮助
附言并且不要忘记，您无法通过android中的任何UI活动进行网络操作。因此，建议使用AsyncTask避免主线程网络异常。
MailSenderActivity.java
YOUR PACKAGE;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class MailSenderActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final Button send = (Button) this.findViewById(R.id.send);
send.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
try {
GMailSender sender = new GMailSender("[email protected]", "password");
sender.sendMail("This is Subject",
"This is Body",
"[email protected]",
"[email protected]");
} catch (Exception e) {
Log.e("SendMail", e.getMessage(), e);
}
}
});
}
}
GmailSender.java
YOUR PACKAGE;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.Security;
import java.util.Properties;
public class GMailSender extends javax.mail.Authenticator {
private String mailhost = "smtp.gmail.com";
private String user;
private String password;
private Session session;
static {
Security.addProvider(new com.provider.JSSEProvider());
}
public GMailSender(String user, String password) {
this.user = user;
this.password = password;
Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", mailhost);
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.quitwait", "false");
session = Session.getDefaultInstance(props, this);
}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception {
try{
MimeMessage message = new MimeMessage(session);
DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));
message.setSender(new InternetAddress(sender));
message.setSubject(subject);
message.setDataHandler(handler);
if (recipients.indexOf(',') > 0)
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
else
message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
Transport.send(message);
}catch(Exception e){
}
}
public class ByteArrayDataSource implements DataSource {
private byte[] data;
private String type;
public ByteArrayDataSource(byte[] data, String type) {
super();
this.data = data;
this.type = type;
}
public ByteArrayDataSource(byte[] data) {
super();
this.data = data;
}
public void setType(String type) {
this.type = type;
}
public String getContentType() {
if (type == null)
return "application/octet-stream";
else
return type;
}
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(data);
}
public String getName() {
return "ByteArrayDataSource";
}
public OutputStream getOutputStream() throws IOException {
throw new IOException("Not Supported");
}
}
}
JSSE提供者
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Alexander Y. Kleymenov
* @version $Revision$
*/
import java.security.AccessController;
import java.security.Provider;
public final class JSSEProvider extends Provider {
public JSSEProvider() {
super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() {
public Void run() {
put("SSLContext.TLS",
"org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
put("Alg.Alias.SSLContext.TLSv1", "TLS");
put("KeyManagerFactory.X509",
"org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
put("TrustManagerFactory.X509",
"org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
return null;
}
});
}
}
在清单中添加以下行：
<uses-permission android:name="android.permission.INTERNET" />
关于c# - 无法连接到SMTP服务器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/24962980/