不使用 simpleMailMessage 發送電子郵件

Question

我正在嘗試使用 spring boot 發送電子郵件，因此我在mailtrap.io上創建了一個帳戶，並添加了如下必要的配置

 spring.mail.host=smtp.mailtrap.io
spring.mail.port=2525
spring.mail.username=0cfcf8adb32fea
spring.mail.password=20d3c0f7a44694
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true

然后我創建了一個這樣的配置java文件：

package com.example.databasedemo;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class Emailcfg {
    @Value("${spring.mail.host}")
    private String host;

    @Value("${spring.mail.port}")
    private int port;

    @Value("${spring.mail.username}")
    private String username;

    @Value("${spring.mail.password}")
    private String password;

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

和一個休息控制器：

    package com.example.databasedemo;

import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;


import javax.validation.ValidationException;

@RestController
@RequestMapping("/Mail")
public class mailController {

    private Emailcfg emailCfg;
    public  mailController(Emailcfg emailCfg){
        this.emailCfg = emailCfg;
    }


    @GetMapping
    public void senddmail(){

        // Create a mail sender
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost(this.emailCfg.getHost());
        mailSender.setPort(this.emailCfg.getPort());
        mailSender.setUsername(this.emailCfg.getUsername());
        mailSender.setPassword(this.emailCfg.getPassword());
        // Create an email instance
        SimpleMailMessage mailMessage = new SimpleMailMessage();
       mailMessage.setFrom("elahidri.eh@gmail.com");
        mailMessage.setTo("elahidri.eh@gmail.com");
        mailMessage.setSubject("mail");
        mailMessage.setText("this is a mail test ");

        // Send mail
        mailSender.send(mailMessage);

    }

}

當我嘗試執行它時，我沒有收到任何錯誤，但我什至沒有收到電子郵件，我在 mailtrap.io 框中找到了電子郵件UPDATE這是我在調試時收到的消息：

DEBUG: JavaMail version 1.6.1
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]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.mailtrap.io", port 2525, isSSL false
220 mailtrap.io ESMTP ready
DEBUG SMTP: connected to host "smtp.mailtrap.io", port: 2525
EHLO elahidri
250-mailtrap.io
250-SIZE 5242880
250-PIPELINING
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-AUTH PLAIN LOGIN CRAM-MD5
250 STARTTLS
DEBUG SMTP: Found extension "SIZE", arg "5242880"
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN CRAM-MD5"
DEBUG SMTP: Found extension "STARTTLS", arg ""
STARTTLS
220 2.0.0 Start TLS
EHLO elahidri
250-mailtrap.io
250-SIZE 5242880
250-PIPELINING
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 AUTH PLAIN LOGIN CRAM-MD5
DEBUG SMTP: Found extension "SIZE", arg "5242880"
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN CRAM-MD5"
DEBUG SMTP: protocolConnect login, host=smtp.mailtrap.io, user=0cfcf8adb32fea, password=<non-null>
DEBUG SMTP: Attempt to authenticate using mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM XOAUTH2 
DEBUG SMTP: Using mechanism LOGIN
DEBUG SMTP: AUTH LOGIN command trace suppressed
DEBUG SMTP: AUTH LOGIN succeeded
QUIT
221 2.0.0 Bye

Answer 1

首先確保您帳戶的兩步驗證已禁用。 然后按照以下步驟操作：

1. 轉到您的 Google 帳戶安全設置（管理您的 Google 帳戶）
2. 點擊左側的安全菜單
3. 向下滾動並找到不太安全的應用程序訪問。
4. 打開允許不太安全的應用程序切換按鈕。

或點擊鏈接： https : //myaccount.google.com/u/3/lesssecureapps?pageId=none

然后在您的項目 application.properties 或 java 配置文件中將此設置用於電子郵件（就像您的一樣）。

spring.mail.host=smtp.gmail.com
spring.mail.port=587
spring.mail.username=your_email_account
spring.mail.password=password
spring.mail.properties.mail.transport.protocol=smtp
spring.mail.properties.mail.smtp.auth=false
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.encoding=UTF-8
spring.mail.properties.mail.from.email=your_email_account

就是這樣。 檢查您的電子郵件是否已發送。

注意：此設置不適用於啟用了兩步驗證的帳戶。

Answer 2

請通過在您的屬性文件中添加以下配置進行調試。

spring.mail.debug=true