In the app.config/web.config you can use the configuration section <system.net> <mailSettings> <smtp> to configure how to deliver e-mails which are sent using the MailMessage and SmtpClient classes in your program.
In development environment you usually don’t want the e-mails to be delivered. Today I’ve found a awesome configuration option, which enables that all outgoing e-mails go to an local folder or file share as eml files.
