Dev2.Runtime.ServiceModel.EmailSources.CanConnectServer C# (CSharp) Method

        ValidationResult CanConnectServer(EmailSource emailSource)
        {
            try
            {
                var userParts = emailSource.UserName.Split('@');

                var smtp = new SmtpClient(emailSource.Host, emailSource.Port)
                {
                    Credentials = new NetworkCredential(userParts[0], emailSource.Password),
                    EnableSsl = emailSource.EnableSsl,
                    DeliveryMethod = SmtpDeliveryMethod.Network,
                    Timeout = emailSource.Timeout
                };

                try
                {
                    smtp.Send(emailSource.TestFromAddress, emailSource.TestToAddress, "Test Message", "This is a test message");
                    return new ValidationResult();
                }
                finally
                {
                    smtp.Dispose();
                }
            }
            catch(SmtpException sex)
            {
                RaiseError(sex);
                var message = sex.Message;
                if(sex.StatusCode == SmtpStatusCode.MustIssueStartTlsFirst && sex.Message.Contains("Learn more at"))
                {
                    message = message.Replace(" Learn more at", "");
                }
                var errors = new StringBuilder();
                errors.AppendFormat("{0} ", message);
                Exception ex = sex.InnerException;
                while(ex != null)
                {
                    errors.AppendFormat("{0} ", ex.Message);
                    ex = ex.InnerException;
                }
                return new ValidationResult
                {
                    IsValid = false,
                    ErrorMessage = errors.ToString()
                };
            }
        }