smtp test 하는 java 코드

SMTP 가 현재 제대로 메일 발송이 되는지 테스트를 하기 위해서 찾아낸 방법입니다.

StringBuffer 안에 응답 요청했던 내용들이 담겨지기 때문에 저 메시지를 이용하여 메일 테스트 내역을 알 수 있었습니다.

package smtp; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.InetAddress; import java.net.Socket; import java.net.UnknownHostException; public class SMTPDemo { public static void main(String args[]) throws IOException, UnknownHostException { String from = "fromEmail"; String to = "sendEmail"; String mailHost = "smtp server"; SMTP mail = new SMTP(mailHost); if (mail != null) { /* if (mail.send(new FileReader(msgFile), from, to)) { System.out.println("Mail sent."); } else { System.out.println("Connect to SMTP server failed!"); } */ mail.send( from, to); } System.out.println("Done."); } static class SMTP { private final static int SMTP_PORT = 25; InetAddress mailHost; InetAddress localhost; BufferedReader in; PrintWriter out; public SMTP(String host) throws UnknownHostException { mailHost = InetAddress.getByName(host); localhost = InetAddress.getLocalHost(); System.out.println("mailhost = " + mailHost); System.out.println("localhost= " + localhost); System.out.println("SMTP constructor done\n"); } @SuppressWarnings({ "resource", "unused" }) public boolean send( String from, String to) throws IOException { Socket smtpPipe; InputStream inn; OutputStream outt; smtpPipe = new Socket(mailHost, SMTP_PORT); if (smtpPipe == null) { return false; } try{ inn = smtpPipe.getInputStream(); outt = smtpPipe.getOutputStream(); in = new BufferedReader(new InputStreamReader(inn)); out = new PrintWriter(new OutputStreamWriter(outt), true); if (inn == null || outt == null) { System.out.println("Failed to open streams to socket."); return false; } StringBuffer sb = new StringBuffer() .append("\n"+in.readLine()) .append("HELO " + localhost.getHostName()); out.println("HELO " + localhost.getHostName()); sb.append(in.readLine()+"\n").append("MAIL From: \n"); out.println("mail from: "); sb.append(in.readLine()+"\n").append("RCPT TO: \n"); out.println("rcpt to : "); sb.append(in.readLine()+"\n"); sb.append("SUBJECT:test\n").append("DATA"); out.println("DATA"); out.println("subject : test"); out.println("\n test mail "); out.println("."); sb.append(in.readLine()+"\n"); sb.append("test."); out.println("QUIT"); sb.append(in.readLine() + "\n") .append("QUIT \n"); System.out.println(sb.toString()); }catch(Exception e){ e.printStackTrace(); }finally{ if(in!=null)in.close(); if(out!=null)out.close(); } return true; } } } /* String initialID = in.readLine(); System.out.println(initialID); System.out.println("HELO " + localhost.getHostName()); out.println("HELO " + localhost.getHostName()); String welcome = in.readLine(); System.out.println(welcome); System.out.println("MAIL From:"); out.println("MAIL From:"); String senderOK = in.readLine(); System.out.println(senderOK); System.out.println("RCPT TO:"); out.println("RCPT TO:"); String recipientOK = in.readLine(); System.out.println(recipientOK); System.out.println("DATA"); out.println("DATA"); String line; System.out.println(msg); System.out.println("."); out.println("."); String acceptedOK = in.readLine(); System.out.println(acceptedOK); System.out.println("QUIT"); out.println("QUIT"); */