c# - sending email in asp.net using web config -

this question has answer here:

• how send email c# codebehind - getting system.net.mail.smtpfailedrecipientexception 3 answers

please guide me write in web config file in c# email sending.

  <system.net> <mailsettings>   <smtp from="yourdomain.com">    </smtp> </mailsettings 

<configuration>   <system.net>     <mailsettings>       <smtp deliverymethod="network">         <network           host="localhost"           port="25"           defaultcredentials="true"         />       </smtp>     </mailsettings>   </system.net> </configuration> 

from: https://msdn.microsoft.com/en-us/library/w355a94k(v=vs.110).aspx