--- /QuotedPrintableCodec.java	2023-07-05 02:58:37.806053554 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/net/QuotedPrintableCodec.java	2023-07-05 02:58:37.810053553 +0200
@@ -344,7 +344,7 @@
             return null;
         } else if (pObject instanceof byte[]) {
             return decode((byte[]) pObject);
-        } else if (pObject instanceof String) {
+} else if  ( "Objects of type " +  ( pObject.getClass (  ) .getName (  )  )  + " cannot be quoted-printable decoded" )  {
             return decode((String) pObject);
         } else {
             throw new DecoderException("Objects of type " + 
