.Net Core邮件发送之MailKit

Install-Package MailKit

MimeMessage message = new MimeMessage();
//发件人
message.From.Add(new MailboxAddress("张三丰", "xxx@qq.com"));
//收件人
message.To.Add(new MailboxAddress("测试", "xxx@163.com"));
//标题
message.Subject = "测试标题内容";
//产生一个支持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);
//附件
string absolutePath = @"F:\桌面\新建文件夹\mysql1.sql";
MimePart attachment = new MimePart()
{
    //读取文件，只能用绝对路径
    ContentObject = new ContentObject(File.OpenRead(absolutePath), ContentEncoding.Default),
    ContentDisposition = new ContentDisposition(ContentDisposition.Attachment),
    ContentTransferEncoding = ContentEncoding.Base64,
    //文件名字
    FileName = Path.GetFileName(absolutePath)
};
multipart.Add(attachment);

//正文内容，发送
message.Body = multipart;
//message.Body = body;
using (SmtpClient client = new SmtpClient())
{
    //Smtp服务器
    client.Connect("smtp.qq.com", 587, false);
    //登录，发送
    //特别说明，对于服务器端的中文相应，Exception中有编码问题，显示乱码了
    client.Authenticate("xxx@qq.com", "xxx");

    client.Send(message);
    //断开
    client.Disconnect(true);
    Console.WriteLine("发送邮件成功");
}