Ah, I think i figured it out...
what happens in many cases is that mail originates from user@localhost.localdomain. I didn't tell opendkim to sign mail from that domain. Still the mail ends up as @wkossen.nl in the recipients mailbox, but sendmail didn't know that at the time the mail was delivered to it. during input, it was localhost.localdomain. therefor no signing. Now I told opendkim in the config file that the domain localhost.localdomain should be signed and it worked.

and squirrelmail delivered mail as user@localhost (no localdomain) I added that domain too. this is far from ideal, a bit of a hack, but I guess it works.

thanks for the help

On Sat, Aug 6, 2011 at 9:27 AM, Murray S. Kucherawy <msk@cloudmark.com> wrote:

First, as Rolf said, you should switch to opendkim.† This package has been unmaintained for over two years.

I just tried it with sendmail 8.14.4 and opendkim 2.4.2 (just released!), and it signed a message I sent using the sendmail shell interface rather than SMTP.† Since that means sendmail does provide milter service to mail thatís piped in, you should be able to get dkim-milter to do it too unless there was a bug in it in this regard.

You can always use LogWhy to track down why your mail isnít being signed.† It might have something to do with a domain name mismatch in the mail youíre feeding.

Good luck,


From: Willem Kossen [mailto:w.kossen@gmail.com]
Sent: Friday, August 05, 2011 5:57 AM
To: dkim-milter-discuss@lists.sourceforge.net
Subject: [dkim-milter-discuss] sendmail non-smtpd possible?

Hi there,

I have succesfully implemented dkim signing in my mailserver, but it only works when mail is delivered to it via smtp. A lot of mail however comes in via sendmail executable for instance because of websites, webmail or applications sending out notices. I want that mail to be signed as well. Is it possible at all (like in postfix non-smtpd filters) or in any other way? in fact, i would like all outgoing mail to be signed.


Willem Kossen

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