[otrs] Customers with multiple mail addresses

Hi all, In our case, we deal with customers, that may email us from one or more email address. i.e.: trouble tickets might be opened from emails abc@example.com, def@example.com and/or support@example.com, Example.com being the customer company. Looking into the system, all three emails will have 3 separate CustomerIDs, and thus, will be dealt with as 3 different customers. Could someone help shed some light please? Best Regards, Muhammad El-Sergani.