(unknown charset) no signing table match for e-mail

From: <yingyot.ch_at_rutnin.com>
Date: Mon, 11 Jul 2016 09:06:57 +0700 (ICT)

Dear Support

      I have install and configure OpenDkim 2.4.2 with RHEL5.4 i386
running with
Dovecot and Postfix 2.3.3.
     Key is generated and add TEXT to DNS (out side DNS)  I can send 
messages out from my mail server but have some error for can not
load key for e-mail 
     Please you
help for solve the problem 

Thank you
Yingyot


Error messges:
Jul 11
08:50:29 mail opendkim[13227]: 839A8CE8264: no signing table match for 'supitcha.ph_at_rutnin.com'
Jul 11 08:50:29 mail opendkim[13227]: 839A8CE8264: no signature
data

TrustHost:
127.0.0.1
172.20.41.14
172.20.41.1
27.131.168.3
localhost
localhost.localdomain
rutnin.com
mail.rutnin.com

KeysTable
default._domainkey.rutnin.com rutnin.com:default:/etc/opendkim/keys/rutnin.com/default.private

SigningTable
.*_at_rutnin\.com default._domainkey.rutnin.com

Opendkim.conf
##
## opendkim.conf -- configuration file for OpenDKIM filter
##
#Canonicalization relaxed/relaxed
Domain                  *
Selector                default
Canonicalization        relaxed/simple
ExternalIgnoreList     
refile:/etc/opendkim/TrustedHosts
InternalHosts          
refile:/etc/opendkim/TrustedHosts
#keyfile               
/etc/opendkim/keys/rutnin.com/default
KeyTable                refile:/etc/opendkim/KeyTable
LogWhy                  Yes
#MinimumKeyBits         1024
Mode                    sv
PidFile                
/var/run/opendkim/opendkim.pid
SigningTable           
refile:/etc/opendkim/SigningTable
Socket                  inet:8891_at_localhost
Syslog                  Yes
SyslogSuccess           Yes
TemporaryDirectory     
/var/tmp
#UMask                  022
UMask                   002
UserID                  opendkim:opendkim
ExternalIgnoreList      /etc/postfix/dkim/hosts
InternalHosts           /etc/postfix/dkim/hosts
Received on Mon Jul 11 2016 - 02:07:13 PST