How Setup SMTP email Server for Sitecore

For setting the email server you need to setup some basic config via path config as below:

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:set="http://www.sitecore.net/xmlconfig/set/">
  <sitecore>
    <settings>
      <setting name="MailServer" value="smtp.gmail.com"/>
      <!--  MAIL SERVER USER
        If the SMTP server requires login, enter the user name in this setting
  -->
      <setting name="MailServerUserName" value="xxx@gmail.com"/>
      <!--  MAIL SERVER PASSWORD
        If the SMTP server requires login, enter the password in this setting
  -->
      <setting name="MailServerPassword" value="xxx"/>
      <!--  MAIL SERVER PORT
        If the SMTP server requires a custom port number, enter the value in this setting.
        The default value is: 25
  -->
      <setting name="MailServerPort" value="587"/>
    </settings>
  </sitecore>
</configuration>

Just ad the below node in web.config at the last but before: