public class MailSender
    {
        public static bool SendEmail(
            string pMailRuEmail,
            string pMailRuPassword,
            string pTo,
            string pSubject,
            string pBody,
            System.Web.Mail.MailFormat pFormat,
            string pAttachmentPath="")
        {
            try
            {
                System.Web.Mail.MailMessage myMail = new System.Web.Mail.MailMessage();
                myMail.Fields.Add
                    ("http://schemas.microsoft.com/cdo/configuration/smtpserver",
                                  "smtp.mail.ru");
                myMail.Fields.Add
                    ("http://schemas.microsoft.com/cdo/configuration/smtpserverport",
                                  "465");
                myMail.Fields.Add
                    ("http://schemas.microsoft.com/cdo/configuration/sendusing",
                                  "2");
                //sendusing: cdoSendUsingPort, value 2, for sending the message using
                //the network.

                //smtpauthenticate: Specifies the mechanism used when authenticating
                //to an SMTP
                //service over the network. Possible values are:
                //- cdoAnonymous, value 0. Do not authenticate.
                //- cdoBasic, value 1. Use basic clear-text authentication.
                //When using this option you have to provide the user name and password
                //through the sendusername and sendpassword fields.
                //- cdoNTLM, value 2. The current process security context is used to
                // authenticate with the service.
                myMail.Fields.Add
                ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
                //Use 0 for anonymous
                myMail.Fields.Add
                ("http://schemas.microsoft.com/cdo/configuration/sendusername",
                    pMailRuEmail);
                myMail.Fields.Add
                ("http://schemas.microsoft.com/cdo/configuration/sendpassword",
                     pMailRuPassword);
                myMail.Fields.Add
                ("http://schemas.microsoft.com/cdo/configuration/smtpusessl",
                     "true");
                myMail.From = pMailRuEmail;
                myMail.To = pTo;
                myMail.Subject = pSubject;
                myMail.BodyFormat = pFormat;
                myMail.Body = pBody;
                myMail.BodyEncoding = System.Text.Encoding.UTF8;

                if (pAttachmentPath.Trim() != "")
                {
                    MailAttachment MyAttachment =
                            new MailAttachment(pAttachmentPath);
                    myMail.Attachments.Add(MyAttachment);
                    myMail.Priority = System.Web.Mail.MailPriority.High;
                }

                System.Web.Mail.SmtpMail.SmtpServer = "smtp.mail.ru";
                System.Web.Mail.SmtpMail.Send(myMail);
                return true;
            }
            catch (Exception ex)
            {
                throw;
            }
        }
    }