Error in FTPS Sender channel while file Archive

Hi All,

I get the below error in the sender FTPS channel when the adapter tries to archive the file from the location.

Attempt to delete file "PART_123" failed. Unable to proceed: com.sap.aii.adapter.file.ftp.FTPEx: 534 Unexpected reply codeRequest denied for policy reasons.

We are trying to access a file from a folder in Mailbox. The file gets picked up and sent to the target location. But the channel is in error status when it tries to archive the file to a local folder in PI server.

Kindly refer the attached screenshot for detailed error log.