Send mail using SMTP

 // <summary>        ///Send mail/// </summary>        /// <param name= "Mailservername" >Server</param>        /// <param name= "Pubmail" >Public Email Address</param>        /// <param name= "Mailusername" >User name</param>        /// <param name= "MailPassword" >Password</param>        /// <param name= "to" >Recipient</param>        /// <param name= "CC" >cc Person</param>        /// <param name= "Mailhistoryguid" >message record GUID, getting attachments</param>        /// <param name= "Mailbody" >message body</param>        /// <param name= "Subject" >Theme</param>        /// <returns></returns>        Private intSendmessage_internal (stringMailservername,stringPubmail,stringMailusername,stringMailPassword,stringTo,stringCcstringMailhistoryguid,stringMailbody,stringSubject) {            //Simple Mail Transfer Protocol classSmtpClient client =NewSmtpClient (); //e-mail message classMailMessage MailMessage =NewMailMessage (); intIssucess =0; Try{client. Host= Mailservername;//setting up a mail serverClient. Port = -;//SMTP Host port number, defaultClient. Deliverymethod =smtpdeliverymethod.network; Client. Credentials=NewSystem.Net.NetworkCredential (Pubmail, MailPassword); Mailmessage.sender=NewMailAddress (Pubmail, mailusername);//Sender Information//Set SenderMailmessage.from =Newmailaddress (Pubmail, mailusername); //set up a pickupDataTable dttemp=getmailtolist (); intCount =DtTemp.Rows.Count; if(Count >0)                {                     for(inti =0; I < count; i++) {MAILMESSAGE.TO.ADD (NewMailAddress (dttemp.rows[i]["Email"]. ToString (), dttemp.rows[i]["UserName"].                    ToString ())); }                }                //Set cc people                if(!string. IsNullOrEmpty (CC)) {dttemp=getccuserlist (); Count=DtTemp.Rows.Count; if(Count >0)                    {                         for(inti =0; I < count; i++) {MAILMESSAGE.CC.ADD (NewMailAddress (dttemp.rows[i]["Email"]. ToString (), dttemp.rows[i]["UserName"].                        ToString ())); }                    }                }                //Add an attachmentdttemp=getattachdocuments (); Count=DtTemp.Rows.Count; if(Count >0)                {                     for(inti =0; I < count; i++) {MAILMESSAGE.ATTACHMENTS.ADD (NewAttachment (HttpContext.Current.Server.MapPath ("/") + dttemp.rows[i][" Location"] + dttemp.rows[i]["FileName"].                    ToString ())); }                }                //ThemeMailmessage.subject =Subject; Mailmessage.body=Mailbody; Mailmessage.subjectencoding= System.Text.Encoding.UTF8;//Message Subject Codemailmessage.bodyencoding = System.Text.Encoding.GetEncoding ("GB2312");//Message content Encodingmailmessage.isbodyhtml =true;//whether the message content is in HTML formatclient.                Send (MailMessage); Issucess=1; }            Catch(Exception e) {mydb.logexception (e); Issucess=0; }            finally{mailmessage.dispose (); }            returnissucess; }     }

Send mail using SMTP