How to Stop Workflow Notifications and Emails Going Out for Short Duration?

Hello,

We would like to do the following:

1)Stop the workflow notification mailer for a few hours.  The workflow notifications and emails must queue up in some table.

2)Go to this table, identify the notifications that we do not want to go out, and update the record status to Sent or whatever the status will do the job.

3)Start the workflow notification mailer and all the notifications and emails we did not update will go out.

How can we do this?

Thank you, Kevin