Danjel Jungersen via Postfix-users:
> I see 3 things that worry me about this record:
> *****
> <record>
> <row>
> <source_ip>212.27.12.12</source_ip>
> <count>2</count>
> <policy_evaluated>
> <disposition>none</disposition>
> <dkim>fail</dkim>
> <spf>fail</spf>
> </policy_evaluated>
> </row>
> <identifiers>
> <envelope_to>some-real-receiver.tld</envelope_to>
> <envelope_from><></envelope_from>
Could that be a delivery status notification, i.e. an email message
sent with MAIL FROM:<>, the null sender address?
> <header_from>mail.jungersen.dk</header_from>
Postfix sends bounce messages as:
From: Mail Delivery System <MAILER-DAEMON@$myorigin>
You have:
myorigin = /etc/mailname
You may want to look there.
> 3)
> It seems like these mails have not been dkim signed, or am I reading it
> wrong?
> If I'm not wrong, what do I do to correct it?
DKIM signing of Postfix-generated mail depends on the settings for
non_smtpd_milters and internal_mail_filter_classes. On my mail
server, MAILER-DAEMON messasges are DKIM signed. But I have:
internal_mail_filter_classes = bounce
which is not the default; the default pre-dates message signing,
and maybe should be updated, just like the 10MB message size limit
which everyone seems to change when they run into it.
Wietse
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