Custom Workflow Email Action

EmailAdministrator.cs

using System.Net.Mail;
using Sitecore.Data.Items;
using Sitecore.Diagnostics;
using Sitecore.Workflows.Simple;
using Sitecore.Links;

namespace YOURPROJECTNAMESPACE
{
	public class EmailAdmin
	{
		public void Process(WorkflowPipelineArgs args)
		{
			Assert.ArgumentNotNull(args, "args");
			var processorItem = args.ProcessorItem;
			if (processorItem == null)
				return;

			var commandItem = processorItem.InnerItem;
			var fullPath = commandItem.Paths.FullPath;
			var from = GetText(commandItem, "from", args);
			var to = GetText(commandItem, "to", args);
			var mailServer = GetText(commandItem, "mail server", args);
			var subject = GetText(commandItem, "subject", args);
			var message = GetText(commandItem, "message", args);
			
			Error.Assert(to.Length > 0, "The 'To' field is not specified in the mail action item: " + fullPath);
			Error.Assert(from.Length > 0, "The 'From' field is not specified in the mail action item: " + fullPath);
			Error.Assert(subject.Length > 0, "The 'Subject' field is not specified in the mail action item: " + fullPath);

			var smtpClient = string.IsNullOrWhiteSpace(mailServer)
				                        ? new SmtpClient()
				                        : new SmtpClient(mailServer); 
			smtpClient.Send(new MailMessage(from, to)
			{
				Subject = subject,
				Body = message
			});
		}

		public string GetText(Item commandItem, string field, WorkflowPipelineArgs args)
		{
			var text = commandItem[field];
			return text.Length > 0 ? ReplaceVariables(text, args) : string.Empty;
		}

		private static string ReplaceVariables(string text, WorkflowPipelineArgs args)
		{
			text = text.Replace("$itemPath$", args.DataItem.Paths.FullPath);
			text = text.Replace("$itemLanguage$", args.DataItem.Language.ToString());
			text = text.Replace("$itemVersion$", args.DataItem.Version.ToString());
			text = text.Replace("$itemUrl$", AbsoluteUrl(args.DataItem, true)
									.Replace("/sitecore", string.Empty)
									.Replace("/shell", string.Empty));
			return text;
		}
		
		private static string AbsoluteUrl(Item item, bool alwaysIncludeServer = false)
		{
		    if (item == null) return string.Empty;
		
		    var options = (UrlOptions)UrlOptions.DefaultOptions.Clone();
		    options.AlwaysIncludeServerUrl = alwaysIncludeServer;
		    options.SiteResolving = true;
		    return LinkManager.GetItemUrl(item, options);
		}
	}
}