Can anyone help explain what "unqualified sender rejected" means when I see
it in my log? I see it maybe once or twice per day, and it's always with
"rejected" -so I'm fairly sure all is okay with my config - I just don't
fully understand what it means when it pops up in the log and I seem to be
getting it more freq. From searching Google, does it have something to do
with H=(XXXXXX) not being a fully qualified domain? I'm certain the
entries below are ghouls/spammers, 210.178.113.140 is from Korea (not
Yahoo) and the others are bogus as well.
Mar 14 23:32:15 exim[26156]: 2003-03-14 23:32:15 unqualified sender
rejected: <yahoo.com> H=(PAVILION) [210.178.113.140] (failed to find host
name from IP address)
Mar 15 01:19:06 exim[17177]: 2003-03-15 01:19:06 unqualified sender
rejected: <access.net.au> H=(adsl-131.96.229.info.com.ph) [203.131.96.229]
(203.131.96.229 does not match any IP address for adsl-131.96.229.info.com.ph)
Mar 15 01:27:06 exim[25067]: 2003-03-15 01:27:06 unqualified sender
rejected: <yahoo.com> H=(TECH5) [218.58.72.16] (failed to find host name
from IP address)