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我正嘗試使用JavaMail（1.4.7）通過Amazon SMTP發送電子郵件。無法使用SMTP使用JavaMail和Amazon SES發送郵件
這裏是我的代碼
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class AmazonSESSample {
static final String FROM = "[email protected]";
static final String TO = "[email protected]";
static final String BODY = "this is the body";
static final String SUBJECT = "hello test";
static final String USER = "...";
static final String PASS = "...";
// Port we will connect to on the Amazon SES SMTP endpoint. We are choosing port 25 because we will use
// STARTTLS to encrypt the connection.
static final int PORT = 465;
static final String PROTOCOL = "smtps";
static final String HOST = "email-smtp.us-west-2.amazonaws.com";
public static void main(String[] args) throws Exception {
// Create a Properties object to contain connection configuration information.
Properties props = System.getProperties();
props.put("mail.transport.protocol", PROTOCOL);
props.put("mail.smtps.host", HOST);
props.put("mail.smtps.port", PORT);
props.put("mail.smtps.user", FROM);
props.put("mail.debug","true");
// Set properties indicating that we want to use STARTTLS to encrypt the connection.
// The SMTP session will begin on an unencrypted connection, and then the client
// will issue a STARTTLS command to upgrade to an encrypted connection.
// props.put("mail.smtps.auth", "true");
// props.put("mail.smtp.starttls.enable", "true");
// props.put("mail.smtp.starttls.required", "true");
// props.put("mail.smtps.ssl.enable", "true");
// Create a Session object to represent a mail session with the specified properties.
Session session = Session.getDefaultInstance(props);
session.setDebug(true);
// Create a message with the specified information.
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(FROM));
msg.setRecipient(Message.RecipientType.TO, new InternetAddress(TO));
msg.setSubject(SUBJECT);
msg.setContent(BODY,"text/plain");
//msg.saveChanges();
// Create a transport.
Transport transport = session.getTransport("smtps");
// Send the message.
try
{
System.out.println("connecting...");
// Connect to Amazon SES using the SMTP username and password you specified above.
transport.connect(HOST, USER, PASS);
System.out.println("connected");
// Send the email.
System.out.println("sending...");
transport.sendMessage(msg, msg.getAllRecipients());
System.out.println("Email sent!");
}
catch (Exception ex) {
System.out.println("The email was not sent.");
System.out.println("Error message: " + ex.getMessage());
}
finally
{
// Close and terminate the connection.
transport.close();
}
}
}
我得到兩種類型的錯誤零星。
有時我得到 「421超時等待來自客戶端的數據」：
DEBUG: JavaMail version 1.4.7
DEBUG: URL jar:file:/Users/adavid/.m2/repository/com/amazonaws/aws-java-sdk-ses/1.9.23/aws-java-sdk-ses-1.9.23.jar!/META-INF/javamail.providers
DEBUG: Bad provider entry:
DEBUG: successfully loaded resource: jar:file:/Users/adavid/.m2/repository/com/amazonaws/aws-java-sdk-ses/1.9.23/aws-java-sdk-ses-1.9.23.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], com.amazonaws.services.simpleemail.AWSJavaMailTransport=javax.mail.Provider[TRANSPORT,aws,com.amazonaws.services.simpleemail.AWSJavaMailTransport,Amazon Web Services LLC]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], aws=javax.mail.Provider[TRANSPORT,aws,com.amazonaws.services.simpleemail.AWSJavaMailTransport,Amazon Web Services LLC]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle]
connecting...
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "email-smtp.us-west-2.amazonaws.com", port 465, isSSL true
220 email-smtp.amazonaws.com ESMTP SimpleEmailService-1062959777 MTyV0IkyBqUpkEgbX2Av
DEBUG SMTP: connected to host "email-smtp.us-west-2.amazonaws.com", port: 465
EHLO 10.8.1.217
250-email-smtp.amazonaws.com
250-8BITMIME
250-SIZE 10485760
250-AUTH PLAIN LOGIN
250 Ok
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg "10485760"
DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN"
DEBUG SMTP: Found extension "Ok", arg ""
DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM
DEBUG SMTP: AUTH LOGIN command trace suppressed
DEBUG SMTP: AUTH LOGIN succeeded
connected
sending...
DEBUG SMTP: use8bit false
MAIL FROM:<[email protected]>
250 Ok
RCPT TO:<[email protected]>
250 Ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP: [email protected]
DATA
354 End data with <CR><LF>.<CR><LF>
From: [email protected]
To: [email protected]
Message-ID: <[email protected]>
Subject: hello test
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
this is the body
.
421 Timeout waiting for data from client.
DEBUG SMTP: got response code 421, with response: 421 Timeout waiting for data from client.
RSET
DEBUG SMTP: EOF: [EOF]
DEBUG SMTP: MessagingException while sending, THROW:
com.sun.mail.smtp.SMTPSendFailedException: 421 Timeout waiting for data from client.
at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2108)
at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:1889)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1120)
at AmazonSESSample.main(AmazonSESSample.java:68)
The email was not sent.
Error message: 421 Timeout waiting for data from client.
QUIT
Exception in thread "main" javax.mail.MessagingException: Can't send command to SMTP host;
nested exception is:
java.net.SocketException: Connection closed by remote host
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:2157)
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:2144)
at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:1210)
at AmazonSESSample.main(AmazonSESSample.java:79)
Caused by: java.net.SocketException: Connection closed by remote host
at sun.security.ssl.SSLSocketImpl.checkWrite(SSLSocketImpl.java:1490)
at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:70)
at com.sun.mail.util.TraceOutputStream.write(TraceOutputStream.java:128)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:2155)
... 3 more
，有時我得到 「EOF：[EOF]」：
DEBUG: JavaMail version 1.4.7
DEBUG: URL jar:file:/Users/adavid/.m2/repository/com/amazonaws/aws-java-sdk-ses/1.9.23/aws-java-sdk-ses-1.9.23.jar!/META-INF/javamail.providers
DEBUG: Bad provider entry:
DEBUG: successfully loaded resource: jar:file:/Users/adavid/.m2/repository/com/amazonaws/aws-java-sdk-ses/1.9.23/aws-java-sdk-ses-1.9.23.jar!/META-INF/javamail.providers
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], com.amazonaws.services.simpleemail.AWSJavaMailTransport=javax.mail.Provider[TRANSPORT,aws,com.amazonaws.services.simpleemail.AWSJavaMailTransport,Amazon Web Services LLC]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], aws=javax.mail.Provider[TRANSPORT,aws,com.amazonaws.services.simpleemail.AWSJavaMailTransport,Amazon Web Services LLC]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: setDebug: JavaMail version 1.4.7
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle]
connecting...
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "email-smtp.us-west-2.amazonaws.com", port 465, isSSL true
220 email-smtp.amazonaws.com ESMTP SimpleEmailService-1062893701 2HRiJbNHu9DYCQClBXLu
DEBUG SMTP: connected to host "email-smtp.us-west-2.amazonaws.com", port: 465
EHLO 10.8.1.217
421 Timeout waiting for data from client.
HELO 10.8.1.217
DEBUG SMTP: EOF: [EOF]
The email was not sent.
Error message: [EOF]
我失去了一些東西，我不知道什麼...
將不勝感激任何幫助
亞馬遜SMTP可能有非常嚴格的超時要求，以防止客戶端浪費連接。也許你的應用程序或你的虛擬機正在受到調度延遲的困擾，這會阻止它足夠快地響應。您可能需要升級到[當前版本的JavaMail]（https://java.net/projects/javamail/pages/Home）。這將允許您使用java.util.logging作爲調試輸出，這將允許您獲取時間戳日誌條目，可能會顯示延遲的位置。 –