[exim] DomainKeys signing makes headers too long -> tagged a…

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Author: Tomasz Chmielewski
Date:  
To: exim-users
Subject: [exim] DomainKeys signing makes headers too long -> tagged as spam
If DomainKeys signing is enabled in Exim, it adds a signature in email's headers.

However, this signature in header is not wrapped, which makes the header very long, i.e.:

DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=somedomain.tld;
    h=Received:To:Subject:Message-Id:From:Date;
    b=b...................................................................................................................xyz;



Such long headers trigger SpamAssassin's HEAD_LONG test, which adds 2.5 spam points to a mail.


How can I make DomainKeys signature properly wrapped when signing with Exim
(note: DKIM signature is wrapped properly, only DomainKeys makes these problems)?



--
Tomasz Chmielewski
http://wpkg.org