I'm using dkim-milter, Postfix on Ubuntu (I think I used these instructions for setting up). Anyway, using the reflectors such as Port25, BlackOps and Altn.com I get passes for DKIM:
X-DKIM: OpenDKIM Filter v2.0.1 medusa.blackops.org o2SGTMSg005616 Authentication-Results: medusa.blackops.org; dkim=pass (1024-bit key) email@example.com; dkim-adsp=pass dkim=pass header.d=example.com (b=miSIxi7TMX; 1:0:good); Authentication-Results: verifier.port25.com header.d=example.com; dkim=pass (matches From: firstname.lastname@example.org);
Yahoo gives this:
Authentication-Results: mta1031.mail.ukl.yahoo.com from=; domainkeys=neutral (no sig); from=example.com; dkim=permerror (key failed)
Where, obviously, example.com is my site address. Is anyone aware of anything different with Yahoo! that would stop these from signing?
-- As an update, Yahoo! has given me a pass as well, but only once, and then I sent an email again, and it failed. dk.elandsys.com has given me a fail and said:
Authentication-Results: ns1.qubic.net; dkim=permerror (verification error: s=mail d=example.com: d2i_PUBKEY_bio() failed) email@example.com; dkim-adsp=unknown
I couldn't find anything useful though on t'internet about this message.