Testing SMTP with .net

Question

I need to configure a SMTP server for testing my website which sends emails (for registration confirmation etc).

I dont actually want the email to be sent, I just w

Answer 1

I think the blog post A Simple SMTP Server Mock for .NET gives you what you need: a SMTP server mock

A SMTP server mock is basically a fake SMTP server which can be used for unit testing of applications which send email messages.

Also, a google search for smtp mock server will provide you with a selection of SMTP servers for testing purposes. Like:

• Dumbster - Java fake SMTP server
• nDumbster - .NET port of Dumbster

Answer 2

You can use Mailnest.io as it is an affordable and yet very effective tool for email testing. It also has a free forever plan for limited usage.

Answer 3

Note that the SmtpClientWrapper class proposed by tvanfosson needs the all-important "virtual" keyword in its declaration of the Send method, otherwise you are back in the same boat as trying to Mock the SmtpClient directly.

Answer 4

As per many of the other suggestions a free tool I've used quite a lot: http://www.toolheap.com/test-mail-server-tool/

Not really for TDD but useful in manual testing as it can pop up an outlook express window with each email that would be sent.

Answer 5

I found this - http://improve.dk/archive/2010/07/01/papercut-vs-smtp4dev-testing-mail-sending-locally.aspx which explain how to use papercut and smtp4dev which are both good tools

Answer 6

If you are on Mac OS X you can use MockSMTP.app