DKIM error: dkim=neutral (bad version) header.i=

Posted by GBC on Server Fault See other posts from Server Fault or by GBC
Published on 2010-02-28T02:58:57Z Indexed on 2012/10/30 23:05 UTC
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Filed under:

centos

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postfix

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spam

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dkim

Ive been struggling the last couple of hours with setting up DKIM on my Postfix/CentOS 5.3 server.

It finally sends and signs the emails, but apparently Google still does not like it. The errors I'm getting are:

dkim=neutral (bad version) [email protected]

from googles "show original" interface.

This is what my DKIM-signature header look like:

v=1; a=rsa-sha1; c=simple/simple; d=mydomain.com.au; s=default; t=1267326852; bh=0wHpkjkf7ZEiP2VZXAse+46PC1c=; h=Date:From:Message-Id:To:Subject; b=IFBaqfXmFjEojWXI/WQk4OzqglNjBWYk3jlFC8sHLLRAcADj6ScX3bzd+No7zos6i KppG9ifwYmvrudgEF+n1VviBnel7vcVT6dg5cxOTu7y31kUApR59dRU5nPR/to0E9l dXMaBoYPG8edyiM+soXo7rYNtlzk+0wd5glgFP1I=

Very appreciative of any suggestions as to how I can solve this problem!

Btw, here is exactly how I installed dkim-milter in CentOS 5.3 for postfix, if anyone is interested (based on this guide):

mkdir dkim-milter
cd dkim-milter

wget http://www.topdog-software.com/oss/dkim-milter/dkim-milter-2.8.3-1.x86_64.rpm
======S======
Newest version: http://www.topdog-software.com/oss/dkim-milter/
======E======

rpm -Uvh dkim-milter-2.8.3-1.x86_64.rpm
/usr/bin/dkim-genkey -r -d mydomain.com.au

======S======
add contents of default.txt to DNS as TXT
_ssp._domainkey TXT dkim=unknown
_adsp._domainkey TXT dkim=unknown
default._domainkey TXT v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GWETBNiQKBgQC5KT1eN2lqCRQGDX+20I4liM2mktrtjWkV6mW9WX7q46cZAYgNrus53vgfl2z1Y/95mBv6Bx9WOS56OAVBQw62+ksXPT5cRUAUN9GkENPdOoPdpvrU1KdAMW5c3zmGOvEOa4jAlB4/wYTV5RkLq/1XLxXfTKNy58v+CKETLQS/eQIDAQAB
======E======

mv default.private default
mkdir /etc/mail/dkim/keys/mydomain.com.au
mv default /etc/mail/dkim/keys/mydomain.com.au
chmod 600 /etc/mail/dkim/keys/mydomain.com.au/default
chown dkim-milt.dkim-milt /etc/mail/dkim/keys/mydomain.com.au/default

vim /etc/dkim-filter.conf
======S======
ADSPDiscard             yes
ADSPNoSuchDomain        yes
AllowSHA1Only           no
AlwaysAddARHeader       no
AutoRestart             yes
AutoRestartRate         10/1h
BaseDirectory           /var/run/dkim-milter
Canonicalization        simple/simple
Domain                  mydomain.com.au #add all your domains here and seperate them with comma
ExternalIgnoreList      /etc/mail/dkim/trusted-hosts
InternalHosts           /etc/mail/dkim/trusted-hosts
KeyList                 /etc/mail/dkim/keylist
LocalADSP               /etc/mail/dkim/local-adsp-rules
Mode                    sv
MTA                     MSA
On-Default              reject
On-BadSignature         reject
On-DNSError             tempfail
On-InternalError        accept
On-NoSignature          accept
On-Security             discard
PidFile                 /var/run/dkim-milter/dkim-milter.pid
QueryCache              yes
RemoveOldSignatures     yes
Selector                default
SignatureAlgorithm      rsa-sha1
Socket                  inet:20209@localhost
Syslog                  yes
SyslogSuccess           yes
TemporaryDirectory      /var/tmp
UMask                   022
UserID                  dkim-milt:dkim-milt
X-Header                yes
======E======

vim /etc/mail/dkim/keylist
======S======
*@mydomain.com.au:mydomain.com.au:/etc/mail/dkim/keys/mydomain.com.au/default
======E======

vim /etc/postfix/main.cf
======S====== Add:
smtpd_milters = inet:localhost:20209
non_smtpd_milters = inet:localhost:20209
milter_protocol = 2
milter_default_action = accept
======E======

vim /etc/mail/dkim/trusted-hosts
======S======
localhost
127.0.0.1
======E======

/etc/mail/local-host-names
======S======
localhost
127.0.0.1
======E======

/sbin/chkconfig dkim-milter on
/etc/init.d/dkim-milter start
/etc/init.d/postfix restart

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