The Send Email action from the Pipeline editor allows you to choose a user defined configuration specified on the action or a default system configuration.
The default system configuration is set up at:
Look for the follow keys and set the appropriate values in both files.
Example values for Outlook email
NOTE: After changing this file you have to restart the IIS and CentroPipelineHost service for the changes to take effect.
If the email action needs to be used without password then please use "false" and not "" or " “ , so it should look like this:
<add key="MailPassword" value="false"/>
Doing the mail action without password could be for instances where you are using internal Email gateway. After making the change, restart the IIS service.