ssh to an LPL solaris server
Use your favorite editor (e.g., vi or pico) to edit this file:
and add a "blacklist_from sender-address" line for each address or class of addresses.
Here are a few examples:
If you do not know how to use a unix editor (e.g., vi or pico) to make that type of change, send email to sys to request that it be done for you.