Re: Using a dsearch lookup to untaint data

On 2025/12/11 8:56 PM, Johnnie Adams via Exim-users wrote:
>       Is it possible to write a lookup for an [email protected] and
> untaint the local part depending on a file foo.txt existing in a given
> directory?

You're making life difficult with that ".txt" element,

Assuming you want this in a router,
something along the lines of

address_data = ${lookup {${local_part}.txt} \
                   dsearch,ret=key,filter=file \
                   {GIVEN_DIRECTORY} \
                  {${sg {$value}{\.txt\$}{}}} \
		 fail \
                  }

with the verified value arriving in $address_data ?


Note that the address_data option is evaluated after the rest of the
router preconditions, so you can't use it's result in the local_part
option.  So that "fail" is needed, to do the work of the local_part
option test.
-- 
Cheers,
   Jeremy

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