我看到了类似的问题，但没有一个对我有帮助。我打算使用javaMailSender发送一封电子邮件。虽然我确信我使用了有效的凭据，但它抱怨我的用户名和密码不正确。因此，以下是属性：

spring.mail.host=smtp.gmail.com
spring.mail.username=myemail@gmail.com
spring.mail.password= mypassword

spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.socketFactory.port=465
spring.mail.properties.mail.smtp.socketFactory.class= javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.smtp.fallback= false
spring.mail.properties.mail.smtp.ssl.enable=true

然后在sender类中创建一个用于注入的Bean：

@Configuration
public class MailConfig {

    @Autowired
    JavaMailSender javaMailSender;

    @Bean
    @ConditionalOnProperty("spring.mail.host")
    public SmtpkMailSender getMockMailSender(){
        return new SmtpkMailSender(javaMailSender);
    }

}

sender类只有一个方法，该方法从以下接口获取：

public interface MailSender {
    void sender(String to, String subject,String body);
}

最后，这里是发件人：

public class SmtpkMailSender implements MailSender   {

    static Log log=LogFactory.getLog(MailSender.class); 

    JavaMailSender javaMailSender;

    public SmtpkMailSender(JavaMailSender javaMailSender){
        this.javaMailSender=javaMailSender;
    }

    public void sender(String to, String subject,String body){
        MimeMessage message=javaMailSender.createMimeMessage();
        try {
            MimeMessageHelper helper=new MimeMessageHelper(message,true);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(body);
            javaMailSender.send(message);
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }

}

既然我对你的事不确定
请myemail@gmail.com和密码
我转到链接https://myaccount.google.com/u/1/lesssecureapps?pageId=none并将其设置为***上的***，但它仍然抱怨以下错误：
错误如下：

javax.mail.AuthenticationFailedException: 535-5.7.8 Username and Password not accepted. Learn more at
535 5.7.8  https://support.google.com/mail/?p=BadCredentials n29sm260426lfi.27 - gsmtp