[Greylist-users] I keep seeing these types of entries

[Keith]

Is this some kind of an attack against greylisting?

Jun 30 09:57:41 mercury sendmail[8053]: i5UDtXSl008053: Milter
(relaydelay): timeout before data read
Jun 30 09:57:41 mercury sendmail[8053]: i5UDtXSl008053: Milter
(relaydelay): to error state
Jun 30 09:57:41 mercury sendmail[8059]: i5UDteSl008059: Milter
(relaydelay): timeout before data read
Jun 30 09:57:41 mercury sendmail[8059]: i5UDteSl008059: Milter
(relaydelay): to error state
Jun 30 09:57:41 mercury sendmail[8059]: i5UDteSl008059:
from=<Security-UPDATE at list.winnetmag.com>, size=14980, class=0,
nrcpts=1, msgid=<Kilauea116568-7308-69221166-0 at flonetwork.com>,
proto=ESMTP, daemon=MTA, relay=mta.publisher.pentonmedia.com
[198.31.62.44]

Is anyone else seeing these?
Thanks,
-Keith