使用身份验证 SMTP Client 和 SSL

Question

我需要使用SSL（SMTPS）和身份验证发送电子邮件。然而，在apache Commons Net中，似乎有AuthenticatingSMTPClient（没有SSL，尽管它扩展了SMTPSClient？）或SMTPSClient（没有身份验证？），我需要两者的组合（SSL +身份验证）。有人知道我该怎么做吗？谢谢！

Answer 1

我知道

现在回复这个为时已晚，但供其他人将来参考，AuthenticatingSMTPClient确实提供了ssl + authentication，因为它正在扩展SMTPSClient. 下面是示例代码，必须在我用数字注释的地方进行修改（例如 //1 ）。

法典：

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.net.PrintCommandListener;
import org.apache.commons.net.io.Util;
import org.apache.commons.net.smtp.AuthenticatingSMTPClient;
import org.apache.commons.net.smtp.AuthenticatingSMTPClient.AUTH_METHOD;
import org.apache.commons.net.smtp.SMTPReply;
import org.apache.commons.net.smtp.SimpleSMTPHeader;
public final class SMTPMail
{
    public static void main(String[] args) throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException
    {
        String sender, recipient, subject, filename, server;
        List<String> ccList = new ArrayList<String>();
        FileReader fileReader = null;
        Writer writer;
        SimpleSMTPHeader header;
        AuthenticatingSMTPClient client;
        server = "<smtp server>"; // 1
        try
        {
            sender = "<your user name>"; // 2
            recipient = "<recipient>"; // 3
            subject = "<mail subject>"; // 4
            header = new SimpleSMTPHeader(sender, recipient, subject);
            filename = "hello.txt"; //This will be the body of your mail //5
            try
            {
                fileReader = new FileReader(filename);
            }
            catch (FileNotFoundException e)
            {
                System.err.println("File not found. " + e.getMessage());
            }
            client = new AuthenticatingSMTPClient("TLS", false);
            client.addProtocolCommandListener(new PrintCommandListener(
                    new PrintWriter(System.out), true));
            client.connect(server);
            if (!SMTPReply.isPositiveCompletion(client.getReplyCode()))
            {
                client.disconnect();
                System.err.println("SMTP server refused connection.");
                System.exit(1);
            }
            client.login("hostname.testing.smtp.api"); //6
            if(client.execTLS())
            {
                if(client.auth(AUTH_METHOD.LOGIN, "<your user name>", "<your password>")) //7
                {
                    client.setSender(sender);
                    client.addRecipient(recipient);
                    for (String recpt : ccList) {
                        client.addRecipient(recpt);
                    }
                    writer = client.sendMessageData();
                    if (writer != null)
                    {
                        writer.write(header.toString());
                        Util.copyReader(fileReader, writer);
                        writer.close();
                        client.completePendingCommand();
                    }
                    if (fileReader != null ) {
                        fileReader.close();
                    }
                }
            }
            client.logout();
            client.disconnect();
        }
        catch (IOException e)
        {
            e.printStackTrace();
            System.exit(1);
        }
    }
}