使用javavalidationsmtp服务器凭据，而不实际发送邮件
要validationsmtp服务器凭据，我应该使用transport.connect()吗？
Session session = Session.getInstance(properties,authenticator); Transport tr=session.getTransport("smtp"); tr.connect();
检查smtp服务器凭据是否正确？
这个问题： ‘在ColdFusion中以编程方式validation邮件服务器连接’有一个java解决方案作为已接受答案的一部分：
int port = 587; String host = "smtp.gmail.com"; String user = "username@gmail.com"; String pwd = "email password"; try { Properties props = new Properties(); // required for gmail props.put("mail.smtp.starttls.enable","true"); props.put("mail.smtp.auth", "true"); // or use getDefaultInstance instance if desired... Session session = Session.getInstance(props, null); Transport transport = session.getTransport("smtp"); transport.connect(host, port, user, pwd); transport.close(); System.out.println("success"); } catch(AuthenticationFailedException e) { System.out.println("AuthenticationFailedException - for authentication failures"); e.printStackTrace(); } catch(MessagingException e) { System.out.println("for other failures"); e.printStackTrace(); }
public boolean confirmSMTP(String host, String port, String username, String password, String auth, String enctype) { boolean result = false; try { Properties props = new Properties(); if (auth.equals(true)) { props.setProperty("mail.smtp.auth", "true"); } else { props.setProperty("mail.smtp.auth", "false"); } if (enctype.endsWith("TLS")) { props.setProperty("mail.smtp.starttls.enable", "true"); } else if (enctype.endsWith("SSL")) { props.setProperty("mail.smtp.startssl.enable", "true"); } Session session = Session.getInstance(props, null); Transport transport = session.getTransport("smtp"); int portint = Integer.parseInt(port); transport.connect(host, portint, username, password); transport.close(); result = true; } catch(AuthenticationFailedException e) { Logging.addMsg(e.toString(), "SMTP: Authentication Failed", false, true); } catch(MessagingException e) { Logging.addMsg(e.toString(), "SMTP: Messaging Exception Occurred", false, true); } catch (Exception e) { Logging.addMsg(e.toString(), "SMTP: Unknown Exception", false, true); } return result; }