> On 16 Mar 2016, at 18:44, Jeremy Harris <[email protected]> wrote:
>
> On 16/03/16 18:23, Ian Eiloart wrote:
>> I have these lines in a router (they’re designed to mitigate the "reply-all"
>> problem after someone spams the entire campus):
>>
>> headers_remove = \
>> Bcc \
>> ${if > { ${strlen:$header_To: } } {4096} { : To }}\
>> ${if > { ${strlen:$header_Cc: } } {4096} { : Cc }}
>
>
>> "failed to expand headers_add or headers_remove: "${strlen" is not a known
>> operator (or a } is missing in a variable reference)"
>
> http://exim.org/exim-html-current/doc/html/spec_html/ch-generic_options_for_routers.html
>
> "Warning 3: Because of the separate expansion of the list items, items
> that contain a list separator must have it doubled. To avoid this,
> change the list separator (6.20). "
Thanks, that’s a useful caution. But after expansion, it should look like this
(assuming both headers are very long):
headers_remove = \
Bcc \
: To \
: Cc
So the list separator isn’t the issue.
RESOLVED: it turns out my problem is due to this bug, which was fixed in
version 4.85. It must have been introduced after
4.76 at some point.
JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
size buffer was used, resulting in syntax errors when an expansion
exceeded it.
--
Ian Eiloart
Postmaster, University of Sussex
+44 (0) 1273 87-3148
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