This article explains how to send an email that includes an attachment from a web form. This is particularly useful if you need to create a web form that allows users to upload their own file attachments. The examples in this article assume that you already have a form with a FileUpload element in it, named “fuAttachment”. This particular method is especially useful since it does not require you to save any files to the server before sending the email. The posted data is instead handled directly.

You should already by familiar with sending emails from ASP.NET before reading this article.

This article covers the various methods of sending an email using C#, either in plain text or HTML.