I use Release 7.1.3_GA_3346.RHEL6_64_20110928134428 CentOSUNKNOWN_64 FOSS edition. Is there a way how to delay the sending the message on the server side?

I mean this: User sends his email that is stored on the server and letīs say in every 10 minutes all the stored emails are send out (In this 10-minute interval other users can send emails and all of them are stored until they are send out at once). However, I would need it to set up for all accounts the way that the user himself would not have to delay it.