Hi folks,
My first attempt to configure DKIM on a Debian wheezy box running
Exim4 4.80 (exim4-daemon-heavy) keeps ending with this error:
DKIM: signing failed (RC -102)
It shows up in the Exim logs every time I try to send a message. As
expected, when my sent messages arrive they have no DKIM headers. My
Debian Exim configuration has these variables set:
DKIM_DOMAIN = umrk.nl
DKIM_SELECTOR = umrk
DKIM_PRIVATE_KEY = /etc/exim4/dkim.256-bit.private.key
DKIM_CANON = relaxed
A 256-bit key is weak, but for now I want to keep things simple. The
key file was created with this command:
~# openssl genrsa -out dkim.256-bit.private.key 256
AFAIK Exim uses the variables I set to create this configuration:
remote_smtp:
debug_print = "T: remote_smtp for $local_part@$domain"
driver = smtp
dkim_domain = umrk.nl
dkim_selector = umrk
dkim_private_key = /etc/exim4/dkim.256-bit.private.key
dkim_canon = relaxed
The key file has permissions 640 with group Debian-exim. I tried
putting double quotes around the variables, but that made no
difference. I saw that the DKIM directives in
/etc/exim4/conf.d/transport/30_exim4-config_remote_smtp had not been
indented properly, but after I corrected that it made no difference
either.
Can anyone say what might be causing the error in question?
Thanks,
Jaap
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