Associating an Email from CRM Email Parser to Contact Record via Function

Associating an Email from CRM Email Parser to Contact Record via Function

Is it possible to create a custom function that will associate email records from zCRM's Email Parser functionality to a contact record where specific fields match?

Our use-case is that we have service providers using third-party event booking systems that issue notifications automatically. They're committed to those systems, so we have to work with them rather than forcing a change to something like ZeptoMail.

We've confirmed that for the systems being used, the email-sending functionality doesn't support BCC, otherwise we'd be using the BCC dropbox approach, however it does have the capability to issue identical notifications to multiple recipients simultaneously.

I'm thinking along the lines that we could have the Email Parser set up as a second recipient, set up user-defined fields, and use these to associate the email to the right Contact record. I've worked out how to achieve the first part, but I can't seem to work out the function element.

Can you help?