[exim] Percentage signs in identity field in DKIM signature …

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Author: Tony Meyer
To: exim users
Subject: [exim] Percentage signs in identity field in DKIM signature header are treated as format placeholders

When I receive (Exim 4.75) messages that have a DKIM signature that
has a percentage sign in the identity field I get paniclog entries
like this:

2011-04-29 04:20:53 1QFdK8-0000hi-Ts string_format: unsupported type
in "%i" in "DKIM: d=iecc.com s=4330.4db9faa9.k1104 c=simple/simple
a=rsa-sha256 i=spamfighter%iecc.com@??? [verification

Example headers (these reproduce the problem, but the identity field
was added to a different signature. The paniclog line above is from a
real message).

Date: Tue, 3 May 2011 12:54:28 +0400
From: tony.meyer@???
To: tony@???
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
d=spamexperts.com; s=testing; i=spamfighter%iecc.com@???;
h=Message-ID:Subject; bh=Hy61WwSEndqwKzArKPLZcQPACoRjmbmRdNbnqGWeg+Y=;
Subject: test

Is this a problem?