Milter-greylist

I use milter-greylist already month and all was ok.
But today I'm getting too many messages "Milter (greylist): timeout before data read, where=mail"
Here piece of log. In this example connection discontinued but that happened after "rcpt to".
So what happened with milter-greylist?

Jun  5 15:07:28 mail sendmail[8199]: m55B76aq008199: Milter (greylist): timeout before data read, where=mail
Jun  5 15:07:28 mail sendmail[8199]: m55B76aq008199: Milter (greylist): to error state
Jun  5 15:07:28 mail sendmail[8199]: m55B76aq008199: <qbjc@...>... User unknown.
Jun  5 15:07:28 mail sendmail[8199]: m55B76aq008199: lost input channel from ppp91-76-73-165.pppoe.mtu-net.ru [91.76.73.165] to MTA after data
Jun  5 15:07:28 mail sendmail[8199]: m55B76aq008199: from=<dima-voroncov@...>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=ppp91-76-73-165.pppoe.mtu-net.ru [91.76.73.165]

Thanks.

-- 
Vladimir Vassiliev <vova@...>