C# 如何實現郵件發送

調用發送

try
            {
                P2BEmail email = new P2BEmail();
                email.fromEmail = txtfromEmail.Text; //　　QQ郵箱
                email.fromPwd = txtfrompwd.Text;　　  //　　QQ郵箱授權碼
                email.emailType = txtemailtype.Text;　　//　　smtp.qq.com
                email.SendEmail(txttoemail.Text, txtsubject.Text, txtbody.Text, "");
                txtmessage.Text = "成功";
            }
            catch (Exception ex)
            {

                txtmessage.Text = ex.Message + ex.StackTrace;
            }

 

郵件發送邏輯

public class P2BEmail
    {
        public string fromEmail = "[e-mail]";//郵件發送方

        public string fromPwd = "XXXXXXXXXX"; //郵件發送方密碼/QQ授權碼

        public string emailType = "smtp.qq.com";//郵件類型 smtp.163.com.cn; smtp.qq.com.cn; smtp.126.com.cn;  smtp.sina.com.cn


        /// <summary>
        /// 發送電子郵件
        /// </summary>
        /// <param name="toEmail">接收方電子郵件</param>
        /// <param name="subject">郵件標題</param>
        /// <param name="body">郵件內空</param>
        public void SendEmail(string toEmail, string subject, string body, string attFile)
        {

            MailAddress addrFrom = new MailAddress(fromEmail, fromEmail);
            MailAddress addrTo = new MailAddress(toEmail, toEmail);
            MailMessage mm = new MailMessage(addrFrom, addrTo);
            mm.BodyEncoding = Encoding.UTF8;
            mm.IsBodyHtml = true;
            mm.Subject = subject;
            mm.Body = body;

            if (!string.IsNullOrEmpty(attFile))
            {
                Attachment att = new Attachment(attFile, MediaTypeNames.Application.Octet);
                ContentDisposition cd = att.ContentDisposition;
                cd.CreationDate = File.GetCreationTime(attFile);
                cd.ModificationDate = File.GetLastWriteTime(attFile);
                cd.ReadDate = File.GetLastAccessTime(attFile);
                mm.Attachments.Add(att);//添加附件
            }

            NetworkCredential nc = new NetworkCredential(fromEmail, fromPwd);
            SmtpClient smtp = new SmtpClient(emailType);
            smtp.EnableSsl = true;　　//啟用SSl
　　　　　　  //　　隨請求一起發送
            smtp.UseDefaultCredentials = false;
　　　　　　  //　　郵件賬戶憑證
            smtp.Credentials = nc;
　　　　　　　//　　郵件發送方式-網絡發送
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
　　　　　　　//　　服務器證書驗證回調　
            ServicePointManager.ServerCertificateValidationCallback =delegate (Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };　　

            try
            {
                smtp.Send(mm);
            }
            catch (SmtpFailedRecipientException)
            {
                smtp.Dispose();
                return;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            smtp.Dispose();

        }

    }

  下載地址：源碼下載.zip