Added SMTP as an ExternalNotifcation method.

NzbDrone.Core/Providers/SmtpProvider.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Mail;
+using System.Text;
+using NLog;
+using Ninject;
+using NzbDrone.Core.Providers.Core;
+
+namespace NzbDrone.Core.Providers
+{
+    public class SmtpProvider
+    {
+        private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
+        private readonly ConfigProvider _configProvider;
+
+        [Inject]
+        public SmtpProvider(ConfigProvider configProvider)
+        {
+            _configProvider = configProvider;
+        }
+
+        public virtual bool SendEmail(string subject, string body, bool htmlBody = false)
+        {
+            try
+            {
+                //Create the Email message
+                var email = new MailMessage();
+
+                //Set the addresses
+                email.From = new MailAddress(_configProvider.SmtpFromAddress);
+
+                //Allow multiple to addresses (split on each comma)
+                foreach (var toAddress in _configProvider.SmtpToAddresses.Split(','))
+                {
+                    email.To.Add(toAddress.Trim());
+                }
+
+                //Set the Subject
+                email.Subject = subject;
+
+                //Set the Body
+                email.Body = body;
+
+                //Html Body
+                email.IsBodyHtml = htmlBody;
+
+                //Create the SMTP connection
+                var smtp = new SmtpClient(_configProvider.SmtpServer, _configProvider.SmtpPort);
+
+                //Enable SSL
+                smtp.EnableSsl = true;
+
+                //Credentials
+                smtp.Credentials = new System.Net.NetworkCredential(_configProvider.SmtpUsername, _configProvider.SmtpPassword);
+
+                //Send the email
+                smtp.Send(email);
+
+                return true;
+            }
+
+            catch (Exception ex)
+            {
+                Logger.Error("There was an error sending an email.");
+                Logger.TraceException(ex.Message, ex);
+            }
+
+            return false;
+        }
+    }
+}