I am working with a mail enabled public folder labeled as "Quotes". It has a public email address of firstname.lastname@example.org. This had been originally set up with a forward to a single user. I was asked to change this to forward to a distribution group, simple enough. I created a Distribution group "Quotes Recipients", enabled unauthenticated sending to the group, set the forward within the public folder to forward to this distribution group, delivering to the folder and then to the forwarding address. This is working, HOWEVER every time you send to this address, internally or externally, you get a bounceback from exchange. Please note, the message does get delivered correctly, just everyone gets a bounceback.
Delivery has failed to these recipients or groups:
There's a problem with the recipient's mailbox. Please try resending the message. If the problem continues, please contact your helpdesk.
Diagnostic information for administrators:
Generating server: companyname.com
#< #5.2.0 smtp;554 5.2.0 STOREDRV.Deliver.Exception:ObjectNotFoundException; Failed to process message due to a permanent exception with message The Active Directory user wasn't found. ObjectNotFoundException: The Active Directory user wasn't found.> #SMTP#