[exim] Intermittent PDKIM failed key import errors

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Szerző: Richard Gilbert
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Címzett: Exim users list
Tárgy: [exim] Intermittent PDKIM failed key import errors
On the 25th June I started to see intermittent PDKIM failed key import
errors for mail from our own users. They are using Google mail and
DKIM was set up through Google, e.g.

2020-07-03 08:49:13 1jrGRd-0003Fh-TT PDKIM: d=sheffield.ac.uk
s=170424.google [failed key import]
2020-07-03 08:49:13 1jrGRd-0003Fh-TT <= d.sharp@???
H=mail-wm1-f43.google.com [209.85.128.43] P=esmtps
X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no K S=14657

but then a few minutes later from the same user no problem...

2020-07-03 08:52:08 1jrGUS-0003HJ-UJ <= d.sharp@???
H=mail-wm1-f48.google.com [209.85.128.48] P=esmtps
X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no K S=3182
DKIM=sheffield.ac.uk

As suggested in another thread about this sort of error I checked the
key at https://dkimcore.org/tools/keycheck.html which tells me that
d=sheffield.ac.uk s=170424.google is a valid DKIM key record.

Any suggestions as to how I can resolve this?

Thank you very much

(We started using Exim shortly after I heard Philip Hazel's talk about
it at the University of Aberdeen in 1996.)

--
Richard Gilbert
IT Services
University of Sheffield, Sheffield, S10 2FN, UK
Phone: +44 114 222 3028