Milter-greylist

Hello,

I'm using milter-greylist for a while, and it works quite nice,
but i can't get the whitelisting with sendmails access.db to work.

I have the following line in my sendmail.cf:

    O Milter.macros.envrcpt={rcpt_mailer}, {rcpt_host}, {rcpt_addr},
{greylist}

acording to the readme that says:

    If you want to use Sendmail access DB as a whitelisting source,
    you will need {greylist} too. milter-greylist will whitelist a
    message when the {greylist} macro is defined and set as WHITE.
    O Milter.macros.envrcpt={greylist}

but i don't understand how the macro is set to WHITE! What do i have
to put in my access.db?

Background: I have an smtp-after-pop setup, that already puts the
IP-Adresses of users that fetch mail via pop3 into the access.db, with
"RELAY" as the value. It would be nice if milter-greylist would also
whitelist these addresses, otherwise roaming users with dynamic
IPs will never get their mail through.

Thanks in advance,
Georg