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我創建了一個使用STARTLS發送電子郵件的示例。在不同的域中託管的3個不同的Windows版本上運行它，一切正常。Javamail和STARTTLS不能在不同平臺上工作
bizzare的事情是，當我在Ubuntu服務器14.02 LTS上運行它時，它不起作用。沒有防火牆阻塞，並且java應用程序二進制文件是相同的。
這是代碼：
// 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 = 25;
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", "smtp");
props.put("mail.smtp.port", PORT);
// 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.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.starttls.required", "true");
props.put("mail.smtp.ssl.enable", "false");
props.put("mail.debug", "true");
// Create a Session object to represent a mail session with the specified properties.
Session session = Session.getDefaultInstance(props);
// Create a message with the specified information.
MimeMessage msg = new MimeMessage(session);
msg.setReplyTo(InternetAddress.parse("[email protected]"));
msg.setFrom(new InternetAddress(FROM));
msg.setRecipient(Message.RecipientType.TO, new InternetAddress(TO));
msg.setSubject(SUBJECT);
msg.setContent(BODY, "html/plain");
// Create a transport.
Transport transport = session.getTransport("smtp");
// Send the message.
try {
System.out.println("Attempting to send an email through the Amazon SES SMTP interface...");
// Connect to Amazon SES using the SMTP username and password you specified above.
transport.connect(HOST, PORT, SMTP_USERNAME, SMTP_PASSWORD);
// Send the email.
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();
}
}
這是在Windows環境中的JavaMail日誌（什麼是工作）：
DEBUG: JavaMail version 1.5.4
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]}
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]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
Attempting to send an email through the Amazon SES SMTP interface...
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "email-smtp.us-west-2.amazonaws.com", port 25, isSSL false
220 email-smtp.amazonaws.com ESMTP SimpleEmailService-1207632523 H3nxFSQJ7ktEpHBHuT38
DEBUG SMTP: connected to host "email-smtp.us-west-2.amazonaws.com", port: 25
EHLO roberton
250-email-smtp.amazonaws.com
250-8BITMIME
250-SIZE 10485760
250-STARTTLS
250-AUTH PLAIN LOGIN
250 Ok
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg "10485760"
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN"
DEBUG SMTP: Found extension "Ok", arg ""
STARTTLS
220 Ready to start TLS
EHLO xxxxxxxxxxxxxxxx
250-email-smtp.amazonaws.com
250-8BITMIME
250-SIZE 10485760
250-STARTTLS
250-AUTH PLAIN LOGIN
250 Ok
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg "10485760"
DEBUG SMTP: Found extension "STARTTLS", arg ""
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
DEBUG SMTP: use8bit false
MAIL FROM:<[email protected]>
250 Ok
RCPT TO:<xxxxxxxxxxxxxxxxxxxxx>
250 Ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP: xxxxxxxxxxxxxxx
DATA
354 End data with <CR><LF>.<CR><LF>
From: xxxxxxxxxxxxxx
Reply-To: xxxxxxxxxxxxx
To: xxxxxxxxxxxxxxxxxxx
Message-ID: <[email protected]>
Subject: Amazon SES test (SMTP interface accessed using Java)
MIME-Version: 1.0
Content-Type: html/plain
Content-Transfer-Encoding: 7bit
This email was sent through the Amazon SES SMTP interface by using Java.
.
250 Ok 0000015138f203b5-6fcd5424-60c3-43eb-9542-83699cf36c46-000000
DEBUG SMTP: message successfully delivered to mail server
Email sent!
QUIT
221 Bye
這是從Ubuntu（環境什麼ISN日誌「T工作）：
DEBUG: JavaMail version 1.5.4
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]}
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]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
Attempting to send an email through the Amazon SES SMTP interface...
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "email-smtp.us-west-2.amazonaws.com", port 25, isSSL false
220 email-smtp.amazonaws.com ESMTP SimpleEmailService-1207632523 tIUsmWGoY4gXLCMWdUpi
DEBUG SMTP: connected to host "email-smtp.us-west-2.amazonaws.com", port: 25
EHLO xxxxxxxxx
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: STARTTLS required but not supported
The email was not sent.
Error message: STARTTLS is required but host does not support STARTTLS
這是調用堆棧錯誤：
javax.mail.MessagingException: STARTTLS is required but host does not support STARTTLS
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:719)
at javax.mail.Service.connect(Service.java:364)
at SESEmail.main(SESEmail.java:64)
Java版本：1.8.0_60-B27
爲什麼發生這種情況？
你在windows機器上使用什麼版本的java，哪些版本在Ubuntu上？ – MaVRoSCy
並請提供與確切的異常堆棧跟蹤一樣的... – MaVRoSCy
在Ubuntu會話中返回EHLO時看到：該服務器不支持STARTTLS（當時，來自該源？）。這是可重複的嗎？ STARTTLS從該服務器不可見？你應該嘗試在25端口上telnetting email-smtp.us-west-2.amazonaws.com並自己啓動EHLO主機名稱 – Jan