In this article you will learn how to create a custom timer job in SharePoint 2013 to send email.
Open your Visual Studio 2102.Then select "File" -> "New" -> "Project..." then select Empty SharePoint Project.Then click Office/SharePoint.Then click SharePoint Solutions.Then click SharePoint 2013 Empty Project.Then set your server name where you want to deploy your solution and choose Deploy on Farm solution.Then click Finish.Then right-click on Solution Explorer (or press Ctrl+ ;).Then add a new item.Select code from the Installed Menu under Visual C# Items and click on Class.Please use the following code.
Essentials of Capacity Planning: Microsoft SharePoint Server 2010