diff --git a/Rnwood.Smtp4dev/CommandLineParser.cs b/Rnwood.Smtp4dev/CommandLineParser.cs
index e3d4b93e8..c04f618a5 100644
--- a/Rnwood.Smtp4dev/CommandLineParser.cs
+++ b/Rnwood.Smtp4dev/CommandLineParser.cs
@@ -53,7 +53,7 @@ public static MapOptions<CommandLineOptions> TryParseCommandLine(IEnumerable<str
                 options.Add("service", "Required to run when registered as a Windows service. To register service: sc.exe create Smtp4dev binPath= \"{PathToExe} --service\"", _ => { });
 
                 options.Add(
-                 "urls=", "The URLs the web interface should listen on. For example, http://localhost:123. Use `*` in place of hostname to listen for requests on any IP address or hostname using the specified port and protocol (for example, http://*:5000)", data => map.Add(data, x => x.Urls));
+                 "urls=", "The URLs the web interface should listen on. For example, http://localhost:123. Use `*` in place of hostname to listen for requests on any IP address or hostname using the specified port and protocol (for example, http://*:5000). Separate multiple values with ;", data => map.Add(data, x => x.Urls));
 
                 options.Add(
                  "basepath=", "Specifies the virtual path from web server root where SMTP4DEV web interface will be hosted. e.g. \"/\" or \"/smtp4dev\"", data => map.Add(data, x => x.ServerOptions.BasePath));
diff --git a/Rnwood.Smtp4dev/Program.cs b/Rnwood.Smtp4dev/Program.cs
index c3fce7721..c07443870 100644
--- a/Rnwood.Smtp4dev/Program.cs
+++ b/Rnwood.Smtp4dev/Program.cs
@@ -190,7 +190,7 @@ private static IHost BuildWebHost(string[] args, CommandLineOptions cmdLineOptio
                 if (!string.IsNullOrEmpty(cmdLineOptions.Urls))
                 {
 
-                    c.UseUrls(cmdLineOptions.Urls);
+                    c.UseUrls(cmdLineOptions.Urls.Split(';', StringSplitOptions.RemoveEmptyEntries).Select(u => u.Trim()).ToArray());
                 }
             });
 
diff --git a/Rnwood.Smtp4dev/Properties/launchSettings.json b/Rnwood.Smtp4dev/Properties/launchSettings.json
index 3f0a598c8..a1f5e2041 100644
--- a/Rnwood.Smtp4dev/Properties/launchSettings.json
+++ b/Rnwood.Smtp4dev/Properties/launchSettings.json
@@ -18,7 +18,7 @@
     },
     "Rnwood.Smtp4dev": {
       "commandName": "Project",
-      "commandLineArgs": "--imapport=0",
+      "commandLineArgs": "--imapport=0 --urls=http://localhost:5000;http://localhost:5001",
       "launchBrowser": true,
       "environmentVariables": {
         "ASPNETCORE_ENVIRONMENT": "Development"
diff --git a/Rnwood.Smtp4dev/Server/Smtp4devServer.cs b/Rnwood.Smtp4dev/Server/Smtp4devServer.cs
index b566a5757..9bedffa64 100644
--- a/Rnwood.Smtp4dev/Server/Smtp4devServer.cs
+++ b/Rnwood.Smtp4dev/Server/Smtp4devServer.cs
@@ -73,7 +73,7 @@ private void CreateSmtpServer()
             {
                 if (this.smtpServer.IsRunning) return;
                 log.Information("SMTP server stopped.");
-                    this.notificationsHub.OnServerChanged().Wait();
+                this.notificationsHub.OnServerChanged().Wait();
             });
         }
 
@@ -93,8 +93,8 @@ private X509Certificate2 GetTlsCertificate()
             {
                 if (!string.IsNullOrEmpty(serverOptions.CurrentValue.TlsCertificate))
                 {
-                     var pfxPassword = serverOptions.CurrentValue.TlsCertificatePassword ?? "";
-           
+                    var pfxPassword = serverOptions.CurrentValue.TlsCertificatePassword ?? "";
+
                     if (string.IsNullOrEmpty(serverOptions.CurrentValue.TlsCertificatePrivateKey))
                     {
                         cert = CertificateHelper.LoadCertificate(serverOptions.CurrentValue.TlsCertificate, pfxPassword);
@@ -273,10 +273,10 @@ private async Task OnMessageReceived(object sender, MessageEventArgs e)
             Message message = new MessageConverter().ConvertAsync(e.Message).Result;
             log.Information("Message received. Client address {clientAddress}, From {messageFrom}, To {messageTo}, SecureConnection: {secure}.",
                 e.Message.Session.ClientAddress, e.Message.From, message.To, e.Message.SecureConnection);
-                message.IsUnread = true;
+            message.IsUnread = true;
 
-                await taskQueue.QueueTask(() =>
-                {
+            await taskQueue.QueueTask(() =>
+            {
                 log.Information("Processing received message");
                 using var scope = serviceScopeFactory.CreateScope();
                 Smtp4devDbContext dbContext = scope.ServiceProvider.GetService<Smtp4devDbContext>();
@@ -284,9 +284,9 @@ await taskQueue.QueueTask(() =>
                 var relayResult = TryRelayMessage(message, null);
                 message.RelayError = string.Join("\n", relayResult.Exceptions.Select(e => e.Key + ": " + e.Value.Message));
 
-                    ImapState imapState = dbContext.ImapState.Single();
+                ImapState imapState = dbContext.ImapState.Single();
                 imapState.LastUid = Math.Max(0, imapState.LastUid + 1);
-                    message.ImapUid = imapState.LastUid;
+                message.ImapUid = imapState.LastUid;
                 message.Session = dbContext.Sessions.Find(activeSessionsToDbId[e.Message.Session]);
                 if (relayResult.WasRelayed)
                 {
@@ -296,16 +296,16 @@ await taskQueue.QueueTask(() =>
                     }
                 }
 
-                    dbContext.Messages.Add(message);
+                dbContext.Messages.Add(message);
 
-                    dbContext.SaveChanges();
+                dbContext.SaveChanges();
 
-                    TrimMessages(dbContext);
-                    dbContext.SaveChanges();
-                    notificationsHub.OnMessagesChanged().Wait();
+                TrimMessages(dbContext);
+                dbContext.SaveChanges();
+                notificationsHub.OnMessagesChanged().Wait();
                 log.Information("Processing received message DONE");
-                }, false).ConfigureAwait(false);
-            }
+            }, false).ConfigureAwait(false);
+        }
 
         public RelayResult TryRelayMessage(Message message, MailboxAddress[] overrideRecipients)
         {
@@ -338,15 +338,15 @@ public RelayResult TryRelayMessage(Message message, MailboxAddress[] overrideRec
                     log.Information("Relaying message to {recipient}", recipient);
 
                     using SmtpClient relaySmtpClient = relaySmtpClientFactory(relayOptions.CurrentValue);
-                            var apiMsg = new ApiModel.Message(message);
-                            MimeMessage newEmail = apiMsg.MimeMessage;
-                            MailboxAddress sender = MailboxAddress.Parse(
-                                !string.IsNullOrEmpty(relayOptions.CurrentValue.SenderAddress)
-                                ? relayOptions.CurrentValue.SenderAddress
-                                : apiMsg.From);
-                            relaySmtpClient.Send(newEmail, sender, new[] { recipient });
+                    var apiMsg = new ApiModel.Message(message);
+                    MimeMessage newEmail = apiMsg.MimeMessage;
+                    MailboxAddress sender = MailboxAddress.Parse(
+                        !string.IsNullOrEmpty(relayOptions.CurrentValue.SenderAddress)
+                        ? relayOptions.CurrentValue.SenderAddress
+                        : apiMsg.From);
+                    relaySmtpClient.Send(newEmail, sender, new[] { recipient });
                     result.RelayRecipients.Add(new RelayRecipientResult() { Email = recipient.Address, RelayDate = DateTime.UtcNow });
-                        }
+                }
                 catch (Exception e)
                 {
                     log.Error(e, "Can not relay message to {recipient}: {errorMessage}", recipient, e.ToString());
@@ -381,12 +381,12 @@ private void TrimSessions(Smtp4devDbContext dbContext)
         public bool IsRunning
         {
             get { return this.smtpServer.IsRunning; }
-            }
+        }
 
         public int PortNumber
         {
             get { return this.smtpServer.PortNumber; }
-            }
+        }
 
         public void TryStart()
         {