Hi all, We're using mod_sms for SIP SIMPLE messaging with delivery notifications (message/imdn+xml). The Call-ID is changed in the chatplan, and this causes issues with matching the delivery notifications to the original message. Changing the Call-ID itself is not an issue, but I'm wondering if it is possible to read the original Call-ID and/or manually set the Call-ID in the chatplan. The message:getHeader("sip_call_id") does not contain the Call-ID. My understanding is that this is due to skip_global_process=false variable set by mod_sms. Setting the sip_call_id variable also does not produce a desired effect, as it is added as another header instead of setting the Call-ID one. The question is - how to match the messages before and after the chatplan? Any help is appreciated. Thank you! Marko