Host: P233 BSD/OS 3.1 smtp-source and smtp-sink on the same host,
100 msgs in 10 sessions.

send = time to send 100 msgs into postfix
rest = time for Postfix to finish
total = total elapsed time

19990627

send	rest	total
14	10	25
10	 8	18
 9	10	19
 9	17	26
 8	11	19
 8	 9	17

19990906

send	rest	total
10	15	25
 9	10	19
 8	 9	17
 9	 8	17
 8	 9	17
 9	 8	17
 8	 9	17
 8	 8	16