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我想通過將代碼部署到GAE來使用SendGrid發送郵件。以下是我的代碼。GAE不適用於使用發送網格使用java發送郵件
private static final String SMTP_HOST_NAME = "smtp.sendgrid.net";
private static final String SMTP_AUTH_USER = "*******";
private static final String SMTP_AUTH_PWD = "*******";
private static final int SMTP_PORT = 2525;
public void sendCustomer(String userName, String toEmail, int custId) {
try {
Properties props = new Properties();
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.auth", "true");
Authenticator auth = new SMTPAuthenticator();
Session mailSession = Session.getDefaultInstance(props, auth);
Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage(mailSession);
Multipart multipart = new MimeMultipart("alternative");
// Sets up the contents of the email message
BodyPart part1 = new MimeBodyPart();
part1.setText("Hello "
+ userName
+ "\n\n\n\n"
+ "Welcome to NotionViz. You have been registered successfully in NotionViz.");
multipart.addBodyPart(part1);
message.setText("UTF-8", "html");
message.setContent(multipart);
message.setFrom(new InternetAddress(SMTP_AUTH_USER));
message.setSubject("Customer Registration");
InternetAddress internetAddress = null;
try {
internetAddress = new InternetAddress(toEmail);
internetAddress.validate();
} catch (Exception e) {
System.out.println("Not a valid email address");
}
message.addRecipient(Message.RecipientType.TO, internetAddress);
InternetAddress address = new InternetAddress("[email protected]");
message.setFrom(address);
// Sends the email
transport.connect(SMTP_HOST_NAME, SMTP_PORT, SMTP_AUTH_USER,
SMTP_AUTH_PWD);
transport.sendMessage(message,
message.getRecipients(Message.RecipientType.TO));
transport.sendMessage(message,
message.getFrom());
transport.close();
} catch (Exception e) {
}
}
// Authenticates to SendGrid
class SMTPAuthenticator extends javax.mail.Authenticator {
@Override
public PasswordAuthentication getPasswordAuthentication() {
String username = SMTP_AUTH_USER;
String password = SMTP_AUTH_PWD;
return new PasswordAuthentication(username, password);
}
}
此程序工作正常，並在本地發送郵件。但是，如果我部署到GAE並檢查，我沒有收到電子郵件。請讓我知道爲什麼GAE限制第三方郵件發送。