On 23/03/15 21:29, Heiko Schlittermann wrote:
> Chris Siebenmann <cks@???> (Mo 23 Mär 2015 19:53:33 CET):
>> We use a commercial anti-spam system behind our Exim-based inbound MX
>> gateway that turns out to be unhappy if a message has 'too many' headers
>> (where this is an undocumented value of more than 512 headers). I'd like
>> to detect and reject these messages in the DATA phase, rather than having
>> them accepted, passed to the anti-spam system, and die quietly.
> Here is an example of the use of this variable in a DATA ACL:
>
> deny message = Too many lines in message header
> condition = \
> ${if <{250}{${eval:$message_linecount - $body_linecount}}}
>
> In the MAIL and RCPT ACLs, the value is zero because at that stage the
> message has not yet been received.
Another way, depending on your definition of "header line"
(lines can be folded...)
and if you have a recent Exim version, might be
something involving $message_headers and ${listcount: }
- treating the headers as a newline-sep list.
--
Cheers,
Jeremy
