For those who have to use email the following is applicable. EOJ XXX, YYY and ZZZ are the keywords. The time limitation has as its main purpose to limit the search time, because the CPU-time of the listserver is limited to 60 seconds. Index gives you a list of all the messages containing in the message body the combination of keywords asked for. Each message is identified by a number.
All numbers are arbitrary examples.
You may also combine the searching and printing jobs in one message in case you know beforehand that the number of hits are limited. The listserver has very powerful database search facilities, of which here only a fraction is shown. The examples are however sufficient in practically all cases.