qmail problem

[omegauser]

Hi,

Qmail is working fine, but there is an error just with a specific domain name, just one, there error is> Sorry,_I_couldn't_find_any_host_by_that_name._(#4.1.2)/

Mar 31 13:10:34 NS1 qmail-queue: dwlib[29042]: mail: all addreses are uncheckable - need to skip scanning (by deny mode)
Mar 31 13:10:34 NS1 qmail-queue: dwlib[29042]: scan: the message(drweb.tmp.pBG1d4) sent by [email protected] to [email protected] should be passed without checks, because contains uncheckable addresses
Mar 31 13:10:34 NS1 qmail: 1143839434.235902 starting delivery 3509: msg 6063779 to remote [email protected]
Mar 31 13:10:34 NS1 qmail: 1143839434.235994 status: local 0/10 remote 1/20
Mar 31 13:10:34 NS1 qmail: 1143839434.236036 new msg 6063912
Mar 31 13:10:34 NS1 qmail: 1143839434.236075 info msg 6063912: bytes 7604 from <[email protected]> qp 29089 uid 2020
Mar 31 13:10:34 NS1 qmail: 1143839434.249627 starting delivery 3510: msg 6063912 to remote [email protected]
Mar 31 13:10:34 NS1 qmail: 1143839434.249718 status: local 0/10 remote 2/20
Mar 31 13:10:34 NS1 qmail: 1143839434.301161 delivery 3509: deferral: Sorry,_I_couldn't_find_any_host_by_that_name._(#4.1.2)/
Mar 31 13:10:34 NS1 qmail: 1143839434.301258 status: local 0/10 remote 1/20
Mar 31 13:10:34 NS1 qmail: 1143839434.312647 delivery 3510: deferral: Sorry,_I_couldn't_find_any_host_by_that_name._(#4.1.2)/
Mar 31 13:10:34 NS1 qmail: 1143839434.312738 status: local 0/10 remote 0/20
Mar 31 13:10:34 NS1 pop3d: Connection, ip=[216.230.140.32]

How can I fix this?????
The remote domain exists but and works .

 

[omegauser]

The error persists, the weird thing is that the error shows with only one domain name.