https://bugs.exim.org/show_bug.cgi?id=2804
Bug ID: 2804
Summary: Header lines are not unfolded correctly
Product: Exim
Version: 4.94
Hardware: x86-64
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: String expansion
Assignee: unallocated@???
Reporter: bugzilla.exim.simon@???
CC: exim-dev@???
According to RFC2822, additional newlines should be removed when unfolding
header lines.
Exim is not doing this which means that comparing $h_Subject: (which is
supposed to be what the MUA displays) in a filter is unnecessarily difficult.
$ git log -1
commit 6b69b71028f15c7ba3157bac955103b764326f60 (HEAD -> master, tag:
exim-4.95-RC2, origin/master, origin/HEAD)
$ cat filter
# Exim filter
if $h_Subject: begin "test1 test2" then
seen
finish
endif
$ cat test.email
Subject: test1
test2 test3
$ src/build-Linux-x86_64/exim -C /dev/null -bf filter < test.email
Testing Exim filter file "filter"
Filtering did not set up a significant delivery.
Normal delivery will occur.
$ cat test.email2
Subject: test1 test2 test3
$ src/build-Linux-x86_64/exim -C /dev/null -bf filter < test.email2
Testing Exim filter file "filter"
Seen finish
Filtering set up at least one significant delivery or other action.
No other deliveries will occur.
Both of these test emails should behave the same.
Extra logging shows that $h_Subject: has an embedded "\n" in this scenario.
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