On 2023-10-26, Gandalf Corvotempesta via Exim-users <[email protected]> 
wrote:
> Hi guys
>
> TL;DR: how can i route, to a specific smarthost, all email based on
> the *recipient* mx IP address ?

Yes, in your config use the dnslookup router for that smarthost use 
ignore_target_hosts with an
inverted host list  ( that is put a ! in front of it )

 hostlist iran_ips = .....
  
 iram_mx:
   driver=dnslookup
   ignore_target_hosts = ! +iran_ips
   route_data=address_of_your_smarthost
   transport = iran_smarthost
   
 
> I can check for the remote MX in the transport, but:
> 1. i'm getting a list of multiple hosts
> 2. i need to convert one (or more) of them to IP addresses
> 3. i need to check if at least one of these IP is inside a file
> (automatically updated from ipdeny.com)

looking in a file is also possible

hostlist iran_ips = /path/to/file

-- 
 Jasen.
 🇺🇦 Слава Україні

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