'SMTP server name Or SMTP IP'
,'SMTP User name'
,'SMTP User Password'
,'From which email'
,'To which email'
,'Email Body Message'
,'Email attachment from the SQL with full window path <optional>'
Make sure that your SMTP is confugure to have relay option from the sending server.
SMTP can be configure on the server itself with IIS. Or you can use external SMTP server to send email.
It is very useful when you want to send some automated message from SQL server itself based on certain task completion or failure.