This is what we send to people who have lost their mail for a day or so:

4.  Listserv Searches

It is possible to search the list archives and retrieve posts for a
specific time period, a specific author, or a specific subject.

Searching by Date:
If the list is busy enough it should be searched in three 8-hour
chunks, since only 100 messages at a time can be returned this way.
Let's say the day you want is May 23rd. Send three email messages to the
Listserv address with anything you like as the "Subject:" and this for
the first message (date is in YY/MM/DD format):

SEARCH ASPERGER * FROM 97/05/23 00:00 to 97/05/23 07:59

...this for the second message:

SEARCH ASPERGER * FROM 97/05/23 08:00 to 97/05/23 15:59

...and this as the third:

SEARCH ASPERGER * FROM 97/05/23 16:00 to 97/05/23 23:59

...each of these will generate an email message back to you, containing
a list of messages that looks something like this:

Item #   Date    Time   Recs     Subject
------   ----    ----   ----     -------
007474   97/05/23  04:09        19       Re: appearing normal
007477   97/05/23  00:44        18       genetic responsibility
007478   97/05/23  00:55        29       Re: ADHD/AS

...and so on. When you've found which messages you would like to see,
send another message to the Listserv address with anything you like as
the "Subject:" and something like this as the message:

        GETPOST ASPERGER 7474 7477-7478

...this command will get message numbers 7474, 7477-7478.

If fewer than 100 messages are expected, one command will work:

SEARCH ASPERGER * FROM 97/05/23 97/07/23

Note that the time and date the listserv uses is not necessarily when
the post was received. The time/date stamp is taken from the sending
computer. People are sending from different time zones, and some
computers are not set to the correct date or time. If the search comes
back with message numbers that are much lower (older/earlier) than the
bulk of the message numbers, these are probably old messages with
incorrect date information. If there are gaps between numbers, then the
time/date stamp of those messages is probably in the future -- even
though the listserv received it between the other messages. The safest
way to retrieve all messages is to get all posts between the first and
last consistent batch of numbers.

In the example above, it is a safe bet that 007475 and 007476 came in
during that time period, but have a later time/date stamp. The command
would be:

        GETPOST ASPERGER 7474-7478

Karen