C# 邮件发送，阿里云邮箱参数设置，邮件发送测试工具下载

   internal class EailHelper
{

    internal static SendEMailStatus sendMail(EmailInfo mailinfo)
    {
        SendEMailStatus status = new SendEMailStatus();

        try
        {
            using (MailMessage mMailMessage = new MailMessage())
            {
                //设置邮件信息
                mMailMessage.From = new MailAddress(mailinfo.fromAddress);
                mMailMessage.To.Add(mailinfo.toAddress);
                mMailMessage.Subject = mailinfo.Subject;
                mMailMessage.Body = mailinfo.Content;
                mMailMessage.IsBodyHtml = true;
                mMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                mMailMessage.Priority = MailPriority.Normal;

                //添加附件
                try
                {
                    Attachment data;
                    ContentDisposition disposition;
                    foreach (var v in mailinfo.AttachFileNames)
                    {
                        data = new Attachment(v.FilePath, MediaTypeNames.Application.Octet);
                        data.Name = v.ReName;
                        disposition = data.ContentDisposition;
                        disposition.CreationDate = File.GetCreationTime(v.FilePath);
                        disposition.ModificationDate = File.GetLastWriteTime(v.FilePath);
                        disposition.ReadDate = File.GetLastAccessTime(v.FilePath);
                        mMailMessage.Attachments.Add(data);
                    }
                }
                catch (Exception ex)
                {
                    Logs.Log.Error(ex, "邮件发送异常");
                    status.success = false;
                    status.message = ex.ToString();
                    return status;
                }

                using (SmtpClient mSmtpClient = new SmtpClient())
                {
                    mSmtpClient.Host = mailinfo.ServerHost;
                    mSmtpClient.Port = mailinfo.ServerPort;
                    mSmtpClient.UseDefaultCredentials = false;
                    mSmtpClient.EnableSsl = mailinfo.mEnableSsl;
                    if (mailinfo.mEnablePwdAuthentication)
                    {
                        System.Net.NetworkCredential nc = new System.Net.NetworkCredential(mailinfo.UserName, mailinfo.Password);
                        //mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
                        //NTLM: Secure Password Authentication in Microsoft Outlook Express
                        mSmtpClient.Credentials = nc;
                        //mSmtpClient.Credentials = nc.GetCredfEnableSslential(mSmtpClient.Host, mSmtpClient.Port, "NTLM");
                    }
                    else
                    {
                        mSmtpClient.Credentials = new System.Net.NetworkCredential(mailinfo.UserName, mailinfo.Password);

                    }
                    mSmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                    mSmtpClient.Timeout = 10 * 1000;
                    mSmtpClient.Send(mMailMessage);
                }
                status.success = true;
                return status;
            }
        }
        catch (Exception ex)
        {
            Logs.Log.Error(ex, "邮件发送异常");
            status.success = false;
            status.message = ex.ToString();
            return status;
        }
    }
}