[otrs] Assignment new eMails to an Customer-ID

Hello, I have n future Request. I can assign Customer-IDs to similar eMail-Addresses. All I need is, that on new incoming eMails, OTRS check if an ID is already assigned to that eMail-Address and replace the ID with the eMail-Address. -- Mit freundlichem Gruß / best regards Timo Eckert.