Dear list,
I would appreciate some advice on setting up DKIM on my mailserver.
I am running a standard Debian 6 box using the default Postfix and
dkim-filter packages. Postfix is configured to use amavisd-new for spam-
and virus filtering.
I have followed the instructions at
http://www.debiantutorials.com/setup-domainkeys-identified-mail-dkim-in-postfix/,
where:
My selector is "list"
My domain name is "list.ecompass.nl"
I have added the following records to my DNS "ecompass.nl" zonefile:
_domainkey.list IN TXT "t=n;o=~"
list._domainkey.list IN TXT "g=*; k=rsa;
p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDRIUfe6fct5L75N0M2SOLVUE16THGX62egUTSj8mzi8uFjO6+ZuI9F8G7sIaHhHQ6RITrqYvH7cNxU2VWhqV9UobEs3ZecCkzThDewdloUmZ0oOkHGmE6zlNnodRcbfP+1VxMNC2KTHhSc8ONk3hlYuI6zyTxkU68Kg7kpajNXjQIDAQAB"
Mail sent to an _at_yahoo.com address contains the following header:
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=list.ecompass.nl;
s=list.private; t=1359040840;
bh=g3zLYH4xKxcPrHOD18z9YfpQcnk/GaJedfustWU5uGs=;
h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type:
Content-Transfer-Encoding;
b=aGYNtCgjRv45NOT+lR2r+PpzeBmSthzDKLiG7XIig//N2qpUxFEmUmscOoeYhr7Bm
uIxaL5dA0KcArlEheEIL66Yfx+Z5Zggdz5cSBMnjmFXyULgramQExWn1y8sSjdw1Xm
zZsr9UHvt2ZQ/O+Xn1yPc8cnXRyOA/fy52xMCaBM=
The test at
http://dkimcore.org/c/keycheck says: "This is a valid DKIM key
record"
However this does not work properly:
- When I test "list._domainkey.list.ecompass.nl" at
http://domainkeys.sourceforge.net/selectorcheck.html gives me the result:
"This selector is in error: Tag 'p': Invalid public key has no modulus"
- mail sent from my server to an _at_yahoo.com address contains the header:
Authentication-Results: mta1092.mail.ac4.yahoo.com from=list.ecompass.nl;
domainkeys=neutral (no sig); from=list.ecompass.nl; dkim=permerror (no
key)
- Mail sent from my server to an _at_google.com address contains the header:
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of beheer_at_list.ecompass.nl designates
5.9.107.177 as permitted sender) smtp.mail=beheer_at_list.ecompass.nl;
dkim=neutral (bad format) header.i=_at_list.ecompass.nl
I am at a loss... Dear list, please help me: any ideas?
Regards,
Lucas
Received on Thu Jan 24 2013 - 16:14:35 PST