Aug 25 03:07:11 localhost opendkim[4541]: 8E7931BE17F:
www.ipv6.roaringpenguin.com [2607:f748:1200:fb:70:38:112:54] not
internal
Aug 25 03:07:11 localhost opendkim[4541]: 8E7931BE17F:
signature=EvmCHXNO domain=roaringpenguin.com selector=canit
result="signature verification failed"
Aug 25 03:07:11 localhost opendkim[4541]: 8E7931BE17F: s=canit
d=roaringpenguin.com SSL error:04091068:rsa routines:INT_RSA_VERIFY:bad
signature
dont know if its just my own fault
i noted ipv6 only hostname on reverse is not always a good idea, but
irelevant for opendkim here
maybe take ownerships to the sender fixes it, mimedefang can do so many
usefull things that are tested very well in canit pro :(