Maximum smtp outgoing connections.

Hi list I am looking for a parameter to set the
maximum number of outgoing smtp connections.

I was reading about it at www.postfix.org but
the only thing that I found similar to that is
'default_destination_concurrency_limit'
and other related with parallel deliveries
to the SAME destination.

Dos it have anything to do with default_process_limit ?

Thanks and sorry about the lame question.