[otrs] Caanot send message to system address

Hi all, We have recently updated OTRS 5.0.26 from OTRS 4. After the update we have faced with a issue. When we try to send an e-mail to an address, a pop-up appears saying : *"This address is registered as system address and cannot be used" * if the address is registered as a queue address. I have googled it, searched at otterhub but found no answer. Is there a way to disable this feature or send e-mails to system addresses? Thanks in advance. *Gökhan Öner* Information Technology Sabancı University gokhanoner@sabanciuniv.edu