How can I limit the number of message my mail server send?

[bluefish1]

How can I limit the number of message my mail server sends in a given period of time.... this would be a global setting.

I am using Postfix ... but sendmail is avalible.
linux 2.4 RH9

Goal: I need to throttle the outgoing mail from my bulk mailer to 75 messages in a 15 min. period.

[bluefish1]

Is there a way of telling postfix to only send the first 10 members of its defered queue?

[root@domain mail]# /usr/sbin/postqueue -p
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
429AA1F56A 575 Mon May 17 17:06:22 user@ domain.com
(deferred transport)
user@ domain.com

446E61F56C 575 Mon May 17 17:06:24 user@ domain.com
(deferred transport)
user@ domain.com

95D741F56D 575 Mon May 17 17:06:24 user@ domain.com
(deferred transport)
user@ domain.com

713021F56F 575 Mon May 17 17:06:25 user@ domain.com
(deferred transport)
user@ domain.com

E4C831F56B 575 Mon May 17 17:06:22 user@ domain.com
(deferred transport)
avalonbloom@ domain.com

EE8001F56E 575 Mon May 17 17:06:24 user@ domain.com
(deferred transport)
user@ domain.com

-- 4 Kbytes in 6 Requests.