The document routing agent does not support the encoding of UTF-8. Instead, it is using ASCII encoding which results that special characters will not be printed.

I am trying to print a label out of a ZPL-File (provided by UPS) which includes polish characters and is coded with ^CI28 and UTF-8. When sending the file directly to the printer the encoding works and all polish characters are displayed and printed correctly. When using the document routing agent the encoding is not working and the printout will include the UTF-8 hex instead of the character itself.

In order to support special characters either the encoding within the document routing agent needs to be upgraded or non-encoding at all.