Apple Script to Email a bunch of people, not too fast, though.

gistfile1.txt

set myMessage to "I'm cleaning up our mailing list. Please hit me back (or go to our site) if you want to be on the new one.

Thanks and I hope you are doing wonderfully.

Many blessings, Mike.
http://www.madhappy.com
"

set mySubject to "New MadhaPPy email list"

display dialog "Please select the recipients in Address Book/Contacts"

tell application "Contacts"
	set theContacts to selection
	repeat with contact in theContacts
		my send_message(mySubject, "Hey " & first name of contact & ",
" & return & myMessage, value of first email of contact)
		delay 10
	end repeat
end tell

on send_message(theSubject, theBody, theAddress)
	tell application "Mail"
		set theNewMessage to make new outgoing message with properties {subject:theSubject, content:theBody & return & return, visible:true}
		tell theNewMessage
			set visibile to true
			make new to recipient at end of to recipients with properties {address:theAddress}
			send
		end tell
	end tell
end send_message