Web Forms for Marketers: Send Email

To have the save action for your form actually send email, you will need to change one of the settings, otherwise you will receive this error whenever submitting the form:

We experience a technical difficulty while processing your request. Your data may not have been correctly saved.

Also in your log (/data/logs/newest log file) you will see this error after the form has been submitted:

Exception: System.Net.WebException
Message: The remote name could not be resolved: 'example.host'
Source: System
   at System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6, Int32 timeout)
   at System.Net.PooledStream.Activate(Object owningObject, Boolean async, Int32 timeout, GeneralAsyncDelegate asyncCallback)
   at System.Net.PooledStream.Activate(Object owningObject, GeneralAsyncDelegate asyncCallback)
   at System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout)
   at System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port)
   at System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port)
   at System.Net.Mail.SmtpClient.GetConnection()
   at System.Net.Mail.SmtpClient.Send(MailMessage message)
WARN  Web Forms for Marketers: an unhandled exception: Failure sending mail. has occured while trying to execute an action.

In your content tree, browse down to: /sitecore/system/Modules/Web Forms for Marketers/Settings/Actions/Save Actions/Send Mail

Under that item there will be a submit section with parameters:

Just replace example.host with your SMTP host information for the server, and form@example.host with the address you want to send mail from – save, and republish!

That should correct the error above and, barring any other issues, hopefully the form will be working as intended!