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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(hù)設置里面的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;//內容

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

_mailMessage.IsBodyHtml
= true;//設置為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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///


///
通過(guò)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(shí)一般都用465端口

///


///
SMTP服務(wù),譬如：smtp.126.com

///
發(fā)件箱

///
密碼

///
昵稱(chēng)

///
發(fā)件箱

///
收件箱

///
主題

///
內容

///
附件

///
端口

///
SSL加密

///


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(hù)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;

}