Hi,

I have setup a postfix mail receiving server. 

On this I am using DKIM milter to verify incoming mail DKIM signatures.

>From some email clients I am getting the following 'bad signature data' error: 

Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: (unknown-jobid) no signing 
domain match for `gmail.com'
Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: (unknown-jobid) no signing 
subdomain match for `gmail.com'
Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: (unknown-jobid) no signing 
keylist match for `sudipta.t...@gmail.com'
Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: (unknown-jobid) not internal
Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: (unknown-jobid) not 
authenticated
Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: (unknown-jobid) mode 
select: verifying
Jun  7 02:10:09 ip-10-194-99-63 dkim-filter[27964]: BA6E210015D: bad signature 
data
Jun  7 02:10:10 ip-10-194-99-63 postfix/cleanup[30131]: BA6E210015D: 
milter-reject: END-OF-MESSAGE from mail-pv0-f176.google.com[74.125.83.176]: 
5.7.0 bad DKIM signature data; from=<sudipta.t...@gmail.com> 
to=<q...@dev1.cpgtest.ostinet.net> proto=ESMTP helo=<mail-pv0-f176.google.com>


can anybody give me any clue why I am getting the following error in my postfix 
logs 

and 

what remedies I can put in to rectify or workaround this 

or 

warn the sender.

Thanks
Ashish Sharma

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