Why DKIM is a bad signature

Question

I installed a mail server sending a postfix.

On this, I use the DKIM milter to verify incoming DKIM signatures.

From some email clients, I receive the following "incorrect signature" errors:

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 ` [e-mail] ' 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=< [e-mail] > to=< [e-mail] > proto=ESMTP helo=<mail-pv0-f176.google.com> 

can someone give me a hint why i am getting the above error in my postfix logs

and

What remedies can I deposit to correct or deceive this?

or

warn the sender.

Thanks in advance

Ashish Sharma

Answer 1

No problem arose after I started using OpenDKIM instead of the dkim filter.

OpenDKIM forks only from the dkim filter code.