https://bugs.exim.org/show_bug.cgi?id=2016
Bug ID: 2016
Summary: DKIM bodyhash mismatch on Gmail > 64kB
Product: Exim
Version: 4.88
Hardware: x86
OS: FreeBSD
Status: NEW
Severity: bug
Priority: medium
Component: DKIM
Assignee: tom@???
Reporter: truxa@???
CC: exim-dev@???
All Gmail messages with body length exceeding the size of 65536 bytes (the size
of an unsingned short int, or a 16 bit int) trigger DKIM signature failure with
'bodyhash mismatch'. DMARC does not align on DKIM either at the message, but on
the other hand, the received message passes an offline test with Perl
Mail::DKIM::Verify perfectly (dkimverify.pl).
The problem is perfectly reproducible (at least on my server) with any 64kB+
message from Gmail, but I did not see the same DKIM errors on 64kB+ messages
from another domain, yet.
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