+ uschar *rubric = (tblock->headers_only)?
+ US"------ This is a copy of the message's header lines.\n"
+ : (tblock->body_only)?
+ US"------ This is a copy of the body of the message, without the headers.\n"
+ :
+ US"------ This is a copy of the message, including all the headers.\n";
+
+ if (bounce_return_size_limit > 0 && !tblock->headers_only)