not sure on how to pass custom error messages from ssis to sql agent job

I want to know how can I force my ssis package to fail based on some condition and when the job runs from sql agent I want to see the custom error message in sql agent result. Here is a brief scenario.

I want to know if a particular table was updated nightly, So I wrote a package and here is the code or brief explanation for that, in my excute sql task

select count(*) as Count
from dbo.orders
where RunDate>= '2013-01-04'

I assign the output of the above query in a vairable and then check the condition @[User::Count]<=0 t if is 0 then I know that table did not update and I can run the following code in execute sql task

exec msdb..sp_send_dbmail
@profile_name = 'Default_SMTP',
@recipients = 'Reporting@lulu.com',
@subject = Orders Table Status',
@body = 'Hello, Orders Table did not update.'

So I have this package which sends me an email every time when the Orders table is not updated and I am running this package as job from sql agent. When I look at the history of the job it shows sucessfully completed every time.

In sql agent I want to show as job status equal failed and give a descriptive error message when the email is sent out and completed when email is not sent out.

I know I can do catch some events in the event handler tab but not sure if it will show the message in the sql agent messages.

Thank you.