sendmail + kas

кладёт в лог

spamtest-milter[19142]: envfrom :Can't connect to spamtest daemon: Incorrect I/O protocol: unexpected response from filtering serivice
spamtest-milter[19142]: cleanup :Can't close session
spamtest-milter[19142]: header :Can't get spamtest session
sendmail[19140]: k09A2oXK019140: from=<xxx@mail.ru>, size=677, class=0, nrcpts=1, msgid=<E1Evtsu-0000C5-00.xxx-mail-ru@f55.mail.ru>, proto=ESMTP, daemon=MSA, relay=f55.mail.ru [194.67.57.90]
spamtest-milter[19142]: header :Can't get spamtest session
last message repeated 15 times
sendmail[19144]: k09A2oXK019140: to=<xxx@xxx.ru>, delay=00:00:01, xdelay=00:00:01, mailer=local, pri=30854, relay=local, dsn=2.0.0, stat=Sent

из-за чего может быть?