Anzeigename autom. um Suffix ergänzen

namespace Microsoft.Exchange.SMTPAgents.AppendSendername
{
    using System;
    using System.IO;
    using System.Reflection;
    using System.Text;
    using System.Diagnostics;
    using Microsoft.Exchange.Data.Transport;
    using Microsoft.Exchange.Data.Transport.Routing;

    public sealed class AppendSendernameFactory : RoutingAgentFactory
    {
        
        public override RoutingAgent CreateAgent(SmtpServer server)
        {
            return new AppendSendernameService(server);
        }
    }

    public class AppendSendernameService : RoutingAgent
    {
        public string STRING_TO_APPEND = "";  
        private SmtpServer smtp_server;
        public AppendSendernameService(SmtpServer server)
        {
            try
            {
                smtp_server = server;
                //  Pfad der Einstellungsdatei angeben / per Default liegt diese im selben Verzeichnis wie die Transport-Agent DLL
                string strPathConfig = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + @"\settings.txt";  
                if (File.Exists(strPathConfig))
                {
                    STRING_TO_APPEND = System.IO.File.ReadAllLines(strPathConfig,System.Text.Encoding.Default);
                }
            }
            catch (Exception ex)
            {
                LogMessage("AppendSenderNameService(Load String from Config)", String.Format("EXCEPTION: Type={0}, Message='{1}'", ex.GetType().FullName, ex.Message));  
            }
            // Add Queue Event Handler
            this.OnCategorizedMessage += new CategorizedMessageEventHandler(this.onCategorizedMessageHandler);
        }
        //onCategorizedMessageHandler Eventhandler
        public void onCategorizedMessageHandler(CategorizedMessageEventSource source, QueuedMessageEventArgs e)
        {
            
            try
            {
                // append text to sender name if mail is send from local domain
                if (Mail_IsLocalDomain(e.MailItem.FromAddress.DomainPart))
                {
                    e.MailItem.Message.From.DisplayName += " " + STRING_TO_APPEND;  
                }
            }
            catch (Exception ex)
            {
                LogMessage("OnSubmittedMessage", String.Format("EXCEPTION: Type={0}, Message='{1}'", ex.GetType().FullName, ex.Message));  
            }

        }
        public void LogMessage(string methodName, string message)
        {
            try
            {
                StringBuilder traceMessage = new StringBuilder();
                traceMessage.Append(System.DateTime.Now.ToString("s"));  
                traceMessage.Append("|");  
                traceMessage.Append(methodName);
                traceMessage.Append("|");  
                traceMessage.Append(message);
                traceMessage.Append("\r\n");  

                Trace.WriteLine(traceMessage.ToString());
            }
            catch
            {
                throw;
            }
        }
        //Check if mail is in local accepted domains
        private bool Mail_IsLocalDomain(string domainPart)
        {
            bool isLocal = false;
            try
            {
                if (!string.IsNullOrEmpty(domainPart))
                {
                    AcceptedDomainCollection adc = this.smtp_server.AcceptedDomains;
                    foreach (AcceptedDomain ad in adc)
                    {
                        if (domainPart.Equals(ad.NameSpecification, StringComparison.CurrentCultureIgnoreCase))
                        {
                            isLocal = true;
                            break;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                LogMessage("GetMailLocal", String.Format("EXCEPTION: Type={0}, Message='{1}'", ex.GetType().FullName, ex.Message));  
            }
            return isLocal;
        }

    }
}