http://www.postgresql.org/lists/pgsql-admin.shtml

subscribe
>
>pgsql-admin
>
>     * This is a general discussion area for users pertaining to the
>       administration, compilation and installation of PostgreSQL.
>     * To post, send mail to pgsql-admin@postgresql.org.
>     * To subscribe or unsubscribe from the list, send mail to
>       majordomo@postgresql.org. The body of the message should contain
>       the single line "subscribe pgsql-admin" or "unsubscribe
>       pgsql-admin".
>     * If you hate getting many mail messages per day then you should
>       consider a digest (where you receive multiple messages to the list
>       as one message to you). To subscribe or unsubscribe from the
>       digested list, send mail to majrodomo@postgresql.org. The body of
>       the message should contain the single line "subscribe
>       pgsql-admin-digest" or "unsubscribe pgsql-admin-digest".