How to Test a .NET Application That Uses SMTP

How many times you had to set up a SMTP service just to test that your .NET application sends the e-mail correctly? I found that I can test the actual application (not the SMTP delivery) by using a bogus SMTP server in the config file.

It pretends to be a SMTP server but it "delivers" the messages by leaving them into a folder you specify.

    <smtp from="" deliveryMethod="SpecifiedPickupDirectory">
      <specifiedPickupDirectory pickupDirectoryLocation="c:MailFolder"/>

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