On Friday, June 27, 2014 17:10:06 Chris Knadle wrote:
> I'm trying to do a custom DNS lookup checking for $sender_address_domain
> DMARC rules, and I seem to be missing some fundamental understanding of how
> to combine string expansion items. I've been reading manual sections 9.10
> and Chapter 11.
>
> Right now I have the following:
>
> acl_check_data:
> [...]
> warn
> set acl_m_dm1 = ${lookup dnsdb{>\n,; txt=_dmarc.$sender_address_domain}\
> {$value} fail}
> set acl_m_dm2 = ${extract {p}{$acl_m_dm1}}
> #condition = ${if def:acl_m_dm1}
> condition = ${if and{ {def:acl_m_dm2} {!eq {$acl_m_dm2} {none;}} }}
> logwrite = $sender_address_domain DMARC lookup = $acl_m_dm1 ::
> $acl_m_dm2
>
>
> And instead I'd like to be able to combine these operations and store the
> result in a single variable, such as:
>
> set acl_m_dm1 = ${extract { \
> ${lookup \dnsdb{>\n,; txt=_dmarc.$sender_address_domain} \
> {$value} fail}
> }{p}{$acl_m_dm1} }
>
> ... but this always seems to lead to an error "missing or misplaced { or }"
> even when the {'s match the }'s, so I think I'm missing something else
> concerning how to combine these.
The default configuration for Exim that comes with Debian has an example
cram_md5 authentication driver that gave me the needed hint -- what was needed
was outside {}'s, i.e. {${<operation>}}.
set acl_m_dm1 = ${extract {p} \
{${lookup dnsdb{>\n,; txt=_dmarc.$sender_address_domain} \
{$value} fail}} }
-- Chris
--
Chris Knadle
Chris.Knadle@???
