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public static bool SendTheMail(string strto, string subj, string bodys)

{

SmtpClient _smtpClient = new SmtpClient();

_smtpClient.EnableSsl = true;

_smtpClient.UseDefaultCredentials = false;

_smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;

_smtpClient.Host = "smtp.qq.com";

_smtpClient.Port = 587;

_smtpClient.Credentials = new System.Net.NetworkCredential("aaa@qq.com", "666");

//密碼不是QQ密碼，是qq賬戶設(shè)置里面的POP3/SMTP服務(wù)生成的key

MailMessage _mailMessage = new MailMessage("aaa@qq.com", "888@yeah.net");

_mailMessage.Subject = subj;//主題 

_mailMessage.Body = bodys;//內(nèi)容

_mailMessage.BodyEncoding = Encoding.Default;//正文編碼 

_mailMessage.IsBodyHtml = true;//設(shè)置為HTML格式 

_mailMessage.Priority = MailPriority.High;//優(yōu)先級 

try

{

_smtpClient.Send(_mailMessage);

Console.WriteLine("發(fā)送成功");

return true;

}

catch (Exception e)

{

Console.WriteLine("發(fā)送失敗");

throw e;

}

}

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/// <summary>

/// 通過System.Web.Mail.MailMessage去發(fā)送，可以不被阿里云限制25端口的使用

/// 暫時一般都用465端口

/// </summary>

/// <param name="smtpserver">SMTP服務(wù),譬如：smtp.126.com</param>

/// <param name="userName">發(fā)件箱</param>

/// <param name="pwd">密碼</param>

/// <param name="nickName">昵稱</param>

/// <param name="strfrom">發(fā)件箱</param>

/// <param name="strto">收件箱</param>

/// <param name="MessageSubject">主題</param>

/// <param name="MessageBody">內(nèi)容</param>

/// <param name="SUpFile">附件</param>

/// <param name="port">端口</param>

/// <param name="enablessl">SSL加密</param>

/// <returns></returns>

public static bool SendWebEmail(string smtpserver, string userName, string pwd, string nickName, string strfrom, string strto,

    string MessageSubject, string MessageBody, string SUpFile, int port, int enablessl = 0)

{

    System.Web.Mail.MailMessage mmsg = new System.Web.Mail.MailMessage();

    //郵件主題

    mmsg.Subject = MessageSubject;

    mmsg.BodyFormat = System.Web.Mail.MailFormat.Html;

    //郵件正文

    mmsg.Body = MessageBody;

    //正文編碼

    mmsg.BodyEncoding = Encoding.UTF8;

    //優(yōu)先級

    mmsg.Priority = System.Web.Mail.MailPriority.High;

    System.Web.Mail.MailAttachment data = null;

    if (SUpFile != "")

    {

        SUpFile = HttpContext.Current.Server.MapPath(SUpFile);//獲得附件在本地地址

        System.Web.Mail.MailAttachment attachment = new System.Web.Mail.MailAttachment(SUpFile); //create the attachment

        mmsg.Attachments.Add(attachment); //add the attachment

    }

    //發(fā)件者郵箱地址

    mmsg.From = string.Format("\"{0}\"<{1}>",nickName, strfrom);

    //收件人收箱地址

    mmsg.To = strto;

    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");

    //用戶名

    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", userName);

    //密碼

    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", pwd);

    //端口

    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", port);

    //使用SSL

    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", (enablessl == 1 ? "true" : "false"));

    //Smtp服務(wù)器

    System.Web.Mail.SmtpMail.SmtpServer = smtpserver;

    try

    {

        System.Web.Mail.SmtpMail.Send(mmsg);

    }

    catch (Exception ex)

    {

        LogHelper.Error(ex.ToString());

        return false;

    }

    return true;

}