Hi, I have otrs 2.4.7 and the raw queue for the administrator is filling itself up every 1 minute with "mail delivery failed returning message to sender" Emailing to other queues seems unaffected. What would be the reason for these messages? and how can i stop them? Any help appreciated ! thanks. This email and any attachments are confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient of this email and its attachments, you must take no action based upon them, nor must you copy or show them to anyone. Please contact the sender if you believe you have received this email in error. Emails are not secure and cannot be guaranteed to be free of errors or viruses. It is your responsibility to scan emails and attachments for viruses before opening them. Any views or opinions expressed are solely those of the author and do not necessarily represent those of The Blackpool Sixth Form College. ##################################################################################### Scanned by MailMarshal - Marshal's comprehensive email content security solution. Download a free evaluation of MailMarshal at www.marshal.com #####################################################################################