Fix bug in last commit (How did this compile?)

src/sbbs3/mailsrvr.c

@@ -1483,7 +1483,7 @@ static int chk_received_hdr(SOCKET socket,const char *buf,IN_ADDR *dnsbl_result)
 		ip[15]=0;
 		if(!inet_aton(ip,&check_addr))
 			break;
-		if(startup->options&DNSBL_DEBUG)
+		if(startup->options&MAIL_OPT_DNSBL_DEBUG)
 			lprintf("%04d DEBUG checking %s (%s)",socket,host_name,ip);
 		if((dnsbl_result->s_addr=dns_blacklisted(socket,check_addr,host_name,dnsbl)))
 				lprintf("%04d !SMTP BLACKLISTED SERVER on %s: %s [%s] = %s"