Asp.net core .NET6 发送邮件

 1、Nuget安装Mailkit

2、appsettings.json 添加邮箱配置信息

"EmailInfo": {
    "SmtpServer": "smtphz.qiye.163.com",
    "Port": 465,
    "Username": "你的邮箱账号",
    "Password": "你的邮箱密码"
  }

3、添加EmailInfoConst.cs

 /// <summary>
    /// 邮箱信息
    /// </summary>
    public class EmailInfoConst
    {
        /// <summary>
        /// SMTP服务器地址
        /// </summary>
        public string SmtpServer { get; set; }
        /// <summary>
        /// 端口
        /// </summary>
        public int Port { get; set; }
        /// <summary>
        /// 用户名
        /// </summary>
        public string Username { get; set; }
        /// <summary>
        /// 密码
        /// </summary>
        public string Password { get; set; }
    }

4、Program.cs 注入邮箱配置信息

builder.Services.AddSingleton(builder.Configuration.GetSection("EmailInfo").Get<EmailInfoConst>());

5、添加EmailHelper.cs 帮助类

/// <summary>
    /// 发送邮箱
    /// </summary>
    [Serializable]
    public static class EmailHelper
    {
        public static string SendEmail(EmailInfoConst emailInfo, string title, string receiveNmae, string receiveEmail, TextPart body)
        {
            try
            {
                MimeMessage message = new MimeMessage();
                //发件人
                message.From.Add(new MailboxAddress("测试发送用户", emailInfo.Username));
                //收件人
                message.To.Add(new MailboxAddress(receiveNmae, receiveEmail));
                //标题
                message.Subject = title;
                生成一个支持Html的TextPart
                //TextPart body = new TextPart(TextFormat.Html)
                //{
                //    Text = "<h1>测试内容</h1> "
                //};

                //创建Multipart添加附件
                Multipart multipart = new Multipart("mixed");
                multipart.Add(body);

                //正文
                message.Body = multipart;

                using (SmtpClient client = new SmtpClient())
                {
                    //Smtp服务器
                    client.Connect(emailInfo.SmtpServer, emailInfo.Port, true);
                    if (client.IsConnected)
                    {
                        //登录
                        client.Authenticate(emailInfo.Username, emailInfo.Password);
                        //发送
                        string result = client.Send(message);
                    }

                    //断开
                    client.Disconnect(true);
                    return "发送邮件成功";
                }
            }
            catch (Exception ex)
            {
                return "发送失败";
            }
        }
    }

5、使用

1.构造函数注入EmailInfoConst 

private readonly ILogger<HomeController> _logger;
        private EmailInfoConst _emailInfo;
        public HomeController(ILogger<HomeController> logger, EmailInfoConst emailInfo)
        {
            _logger = logger;
            _emailInfo = emailInfo;
        }

2.调用SendEmail函数

//生成一个支持Html的TextPart
TextPart body = new TextPart(TextFormat.Html)
        {
            Text = "<h1>测试邮件</h1> "
       };
body.Text += $"<p> 请勿回复     </p>";
string sendResult = EmailHelper.SendEmail(_emailInfo, "邮箱测试", "接收人", "接收邮箱", body);

参考1：.net core之邮件发送 - 掘金

参考2：Asp.net core 发送邮件_眸笑丶的博客-CSDN博客_.net core 发邮件

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