SmtpSender added

Massmailer.Shared/Class1.cs

@@ -1,8 +0,0 @@
-using System;
-
-namespace Massmailer.Shared
-{
-    public class Class1
-    {
-    }
-}

Massmailer.Shared/IMailer.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Massmailer.Shared
+{
+    public interface IMailer
+    {
+        Task SendMailAsync(string email, string subject, string body);
+    }
+}

Massmailer.Shared/Logic/Mailer.cs

@@ -0,0 +1,44 @@
+using MailKit.Net.Smtp;
+using Massmailer.Shared.Model;
+using MimeKit;
+using System;
+using System.Threading.Tasks;
+
+namespace Massmailer.Shared.Logic
+{
+    public class Mailer : IMailer
+    {
+        private readonly SmtpSettings smtpSettings;
+
+        public Mailer(SmtpSettings smtpSettings)
+        {
+            this.smtpSettings = smtpSettings;
+        }
+
+        public async Task SendMailAsync(string email, string subject, string body)
+        {
+            try
+            {
+                var message = new MimeMessage();
+                message.From.Add(new MailboxAddress(this.smtpSettings.SenderName, this.smtpSettings.SenderEmail));
+                message.To.Add(new MailboxAddress(email, email));
+                message.Subject = subject;
+                message.Body = new TextPart("html") { Text = body };
+
+                using (var client = new SmtpClient())
+                {
+                    client.ServerCertificateValidationCallback = (s, c, h, e) => true;
+
+                    await client.ConnectAsync(this.smtpSettings.Server, this.smtpSettings.Port, this.smtpSettings.UseSsl);
+                    await client.AuthenticateAsync(this.smtpSettings.Username, this.smtpSettings.Password);
+                    await client.SendAsync(message);
+                    await client.DisconnectAsync(true);
+                }
+            }
+            catch (Exception ex)
+            {
+                throw new InvalidOperationException(ex.Message);
+            }
+        }
+    }
+}

Massmailer.Shared/Massmailer.Shared.csproj

@@ -1,7 +1,11 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="MailKit" Version="2.10.1" />
+  </ItemGroup>
+
 </Project>

Massmailer.Shared/Model/SmtpSettings.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Massmailer.Shared.Model
+{
+    public class SmtpSettings
+    {
+        public string Server { get; set; }
+
+        public int Port { get; set; }
+
+        public string SenderName { get; set; }
+
+        public string SenderEmail { get; set; }
+
+        public string Username { get; set; }
+
+        public string Password { get; set; }
+
+        public bool UseSsl { get; set; }
+    }
+}

Massmailer.UI/Massmailer.UI.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>