mail concept in asp.net

<add key="EmailTo" value="ToYou@TestEmail.com.ph;" />
<add key="EmailCc" value="ToMe@TestEmail.com.ph;" />
<add key="EmailFrom" value="FromMe@TestEmail.com" />
<add key="SMTP_Address" value="123.456.780.9" />

public static class EmailHandler
      {
          public static string SendEmailFeedback(string subject, string message, string contact)
          {
              string strEmailResult = string.Empty;
              string strEmailFrom = string.Empty;
              string strEmailTo = string.Empty;
              string strEmailCc = string.Empty;
              string strEmailSMTP = string.Empty;

              strEmailFrom = ConfigurationSettings.AppSettings["EmailFrom"].ToString();
              strEmailTo = ConfigurationSettings.AppSettings["EmailTo"].ToString();
              strEmailCc = ConfigurationSettings.AppSettings["EmailCc"].ToString();
              strEmailSMTP = ConfigurationSettings.AppSettings["SMTP_Address"].ToString();

              try
              {
                  MailMessage emailMessage = new MailMessage();
                  SmtpClient mailClient = new SmtpClient(strEmailSMTP);
                  emailMessage.Priority = MailPriority.High;
                  emailMessage.From = new MailAddress(strEmailFrom);
                  emailMessage.Subject = subject;
                  emailMessage.Body = message;
                  emailMessage.IsBodyHtml = true;

                  if ((strEmailTo.Contains("@")) && (strEmailTo.Length > 4))
                  {
                      int count = CountStringOccurrences(strEmailTo, ";");

                      for (int i = 0; i < count; i++)
                      {
                          string strToRecieptient = strEmailTo.Split(';')[i].ToString();
                          emailMessage.To.Add(strToRecieptient);
                      }

                  }

                  if (strEmailCc != string.Empty)
                  {
                      if ((strEmailCc.Contains("@")) && (strEmailCc.Length > 4))
                      {
                          int icount = CountStringOccurrences(strEmailCc, ";");

                          for (int i = 0; i < icount; i++)
                          {
                              string strCCrecipient = strEmailCc.Split(';')[i].ToString();
                              emailMessage.Bcc.Add(strCCrecipient);
                          }
                      }
                  }

                  mailClient.Send(emailMessage);

                  strEmailResult = "Message was successfully sent to the System Administrator.";
              }
              catch (Exception ex)
              {
                  strEmailResult = ex.Message.ToString();
              }

              return strEmailResult;
          }

          private static int CountStringOccurrences(string text, string pattern)
          {
              int count = 0;
              int i = 0;
              while ((i = text.IndexOf(pattern, i)) != -1)
              {
                  i += pattern.Length;
                  count++;
              }
              return count;
          }
      }