diff --git a/Massmailer.Shared/Logic/Mailer.cs b/Massmailer.Shared/Logic/Mailer.cs
index e72bb59..3e218da 100644
--- a/Massmailer.Shared/Logic/Mailer.cs
+++ b/Massmailer.Shared/Logic/Mailer.cs
@@ -39,6 +39,34 @@ namespace Massmailer.Shared.Logic
             return message;
         }
 
+        public async Task SendMailsAsync(MassmailerProject project)
+        {
+            try
+            {
+                await this.smtpClient.ConnectAsync(this.smtpSettings.Server, this.smtpSettings.Port, this.smtpSettings.UseSsl);
+                await this.smtpClient.AuthenticateAsync(this.smtpSettings.Username, this.smtpSettings.Password);
+
+                foreach (var recipient in project.Recipients)
+                {
+                    await this.CheckForWaitTime();
+
+                    var message = this.CreateMessage(recipient.Address, project.Subject, project.Body);
+                    await this.smtpClient.SendAsync(message);
+
+                    this.lastMailSent = DateTime.Now;
+                    recipient.IsSent = true;
+                    recipient.SentDate = this.lastMailSent;
+                    this.hub.Publish<MailSentEvent>(new MailSentEvent(message.To[0].ToString(), this.lastMailSent));
+                }
+
+                await this.smtpClient.DisconnectAsync(true);
+            }
+            catch (Exception ex)
+            {
+                throw new InvalidOperationException("Something went wrong while sending many mails", ex);
+            }
+        }
+
         public List<MimeMessage> CreateMessages(List<string> recipients, string subject, string body)
         {
             var result = new List<MimeMessage>();
diff --git a/Massmailer.Shared/Logic/MassmailerProjectLogic.cs b/Massmailer.Shared/Logic/MassmailerProjectLogic.cs
new file mode 100644
index 0000000..fd4e4d3
--- /dev/null
+++ b/Massmailer.Shared/Logic/MassmailerProjectLogic.cs
@@ -0,0 +1,28 @@
+using Massmailer.Shared.Model;
+using Newtonsoft.Json;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace Massmailer.Shared.Logic
+{
+    public static class MassmailerProjectLogic
+    {
+        public async static void Save(MassmailerProject project, string filePath)
+        {
+            var json = JsonConvert.SerializeObject(project);
+            await File.WriteAllTextAsync(filePath, json);
+        }
+
+        public async static Task<MassmailerProject> Load(string filePath)
+        {
+            var project = new MassmailerProject();
+            if (File.Exists(filePath))
+            {
+                var json = await File.ReadAllTextAsync(filePath);
+                project = JsonConvert.DeserializeObject<MassmailerProject>(json);
+            }
+
+            return project;
+        }
+    }
+}
diff --git a/Massmailer.Shared/Logic/SmtpSettingsLogic.cs b/Massmailer.Shared/Logic/SmtpSettingsLogic.cs
new file mode 100644
index 0000000..4a3a76a
--- /dev/null
+++ b/Massmailer.Shared/Logic/SmtpSettingsLogic.cs
@@ -0,0 +1,28 @@
+using Massmailer.Shared.Model;
+using Newtonsoft.Json;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace Massmailer.Shared.Logic
+{
+    public static class SmtpSettingsLogic
+    {
+        public async static void Save(SmtpSettings project, string filePath)
+        {
+            var json = JsonConvert.SerializeObject(project);
+            await File.WriteAllTextAsync(filePath, json);
+        }
+
+        public async static Task<SmtpSettings> Load(string filePath)
+        {
+            var project = new SmtpSettings();
+            if (File.Exists(filePath))
+            {
+                var json = await File.ReadAllTextAsync(filePath);
+                project = JsonConvert.DeserializeObject<SmtpSettings>(json);
+            }
+
+            return project;
+        }
+    }
+}
diff --git a/Massmailer.Shared/Massmailer.Shared.csproj b/Massmailer.Shared/Massmailer.Shared.csproj
index a043f07..d62e25f 100644
--- a/Massmailer.Shared/Massmailer.Shared.csproj
+++ b/Massmailer.Shared/Massmailer.Shared.csproj
@@ -6,6 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="MailKit" Version="2.10.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="PubSub" Version="4.0.1" />
   </ItemGroup>
 
diff --git a/Massmailer.Shared/Model/MassmailProject.cs b/Massmailer.Shared/Model/MassmailProject.cs
deleted file mode 100644
index 95d699e..0000000
--- a/Massmailer.Shared/Model/MassmailProject.cs
+++ /dev/null
@@ -1,13 +0,0 @@
-using System.Collections.Generic;
-
-namespace Massmailer.Shared.Model
-{
-    public class MassmailProject
-    {
-        public List<MassmailRecipient> Recipient { get; set; }
-
-        public string Subject { get; set; }
-
-        public string Body { get; set; }
-    }
-}
diff --git a/Massmailer.Shared/Model/MassmailerProject.cs b/Massmailer.Shared/Model/MassmailerProject.cs
new file mode 100644
index 0000000..1532521
--- /dev/null
+++ b/Massmailer.Shared/Model/MassmailerProject.cs
@@ -0,0 +1,18 @@
+using System.Collections.Generic;
+
+namespace Massmailer.Shared.Model
+{
+    public class MassmailerProject
+    {
+        public MassmailerProject()
+        {
+            this.Recipients = new List<MassmailerRecipient>();
+        }
+
+        public List<MassmailerRecipient> Recipients { get; set; }
+
+        public string Subject { get; set; }
+
+        public string Body { get; set; }
+    }
+}
diff --git a/Massmailer.Shared/Model/MassmailRecipient.cs b/Massmailer.Shared/Model/MassmailerRecipient.cs
similarity index 66%
rename from Massmailer.Shared/Model/MassmailRecipient.cs
rename to Massmailer.Shared/Model/MassmailerRecipient.cs
index b15bf44..bece288 100644
--- a/Massmailer.Shared/Model/MassmailRecipient.cs
+++ b/Massmailer.Shared/Model/MassmailerRecipient.cs
@@ -2,9 +2,9 @@
 
 namespace Massmailer.Shared.Model
 {
-    public class MassmailRecipient
+    public class MassmailerRecipient
     {
-        public string Recipient { get; set; }
+        public string Address { get; set; }
 
         public bool IsSent { get; set; }
 
diff --git a/Massmailer.Shared/Model/SmtpSettings.cs b/Massmailer.Shared/Model/SmtpSettings.cs
index d094021..b12e89a 100644
--- a/Massmailer.Shared/Model/SmtpSettings.cs
+++ b/Massmailer.Shared/Model/SmtpSettings.cs
@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace Massmailer.Shared.Model
+namespace Massmailer.Shared.Model
 {
     public class SmtpSettings
     {
diff --git a/Massmailer.UI/Constants.cs b/Massmailer.UI/Constants.cs
new file mode 100644
index 0000000..af168f2
--- /dev/null
+++ b/Massmailer.UI/Constants.cs
@@ -0,0 +1,9 @@
+namespace Massmailer.UI
+{
+    public class Constants
+    {
+        public const string SmtpSettingsFileName = "smtpsettings.json";
+
+        public const string ProjectFileExtension = "mailer";
+    }
+}
diff --git a/Massmailer.UI/Views/MainView.xaml b/Massmailer.UI/Views/MainView.xaml
index de66884..7836fe0 100644
--- a/Massmailer.UI/Views/MainView.xaml
+++ b/Massmailer.UI/Views/MainView.xaml
@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:Massmailer.UI"
         mc:Ignorable="d"
-        Title="MainWindow" Height="450" Width="800">
+        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
     <Grid>
         <Button x:Name="BtnSend" Click="Button_Click" Content="Send"/>
     </Grid>
diff --git a/Massmailer.UI/Views/MainView.xaml.cs b/Massmailer.UI/Views/MainView.xaml.cs
index 0bc3c51..6337706 100644
--- a/Massmailer.UI/Views/MainView.xaml.cs
+++ b/Massmailer.UI/Views/MainView.xaml.cs
@@ -4,6 +4,7 @@ using Massmailer.Shared.Model;
 using PubSub;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -15,16 +16,15 @@ using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Navigation;
-using System.Windows.Shapes;
 
 namespace Massmailer.UI
 {
-    /// <summary>
-    /// Interaction logic for MainWindow.xaml
-    /// </summary>
     public partial class MainView : Window
     {
         private readonly Hub hub = new Hub();
+        private SmtpSettings smtpSettings;
+        private MassmailerProject project;
+        private string selectedFilePath = string.Empty;
 
         public MainView()
         {
@@ -60,12 +60,41 @@ namespace Massmailer.UI
                 "10@test.local"
             };
 
-            await mailer.SendMailsAsync(recipients, "Hello World Subject", "Hello World Body");
+            var project = new MassmailerProject();
+            project.Recipients.Add(new MassmailerRecipient { Address = "1@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "2@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "3@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "4@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "5@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "6@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "7@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "8@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "9@test.local" });
+            project.Recipients.Add(new MassmailerRecipient { Address = "10@test.local" });
+            project.Subject = "Hello World Subject";
+            project.Body = "Hello World Body";
+
+            await mailer.SendMailsAsync(project);
+
+            var result = "";
+            foreach (var recipient in project.Recipients)
+            {
+                result += $"{recipient.Address} - {recipient.IsSent} - {recipient.SentDate}\r\n";
+            }
+
+            MassmailerProjectLogic.Save(project, "project.json");
+
+            MessageBox.Show(result);
         }
 
         private void MailSentEventHandler(MailSentEvent mailSentEvent)
         {
             this.BtnSend.Content = $"mail sent: {mailSentEvent.Recipient} at {mailSentEvent.Timestamp}";
         }
+
+        private async void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            this.smtpSettings = await SmtpSettingsLogic.Load(Path.Combine(Environment.CurrentDirectory, Constants.SmtpSettingsFileName));
+        }
     }
 }