Postfix app bug with debian

Hello, I have potentially 1 issues but I want your view. The problem is about postfix application in debian server I add all script and extend in snmp conf but th poller return this oid .1.3.6.1.4.1.8072.1.3.2.3.1.2.5.109.97.105.108.113 in Hex-string and not in string ! Somebody have this problem ?

root@mon3:/home/librenms# ./validate.php

Component Version
LibreNMS 1.39-4-gd257fa0ea
DB Schema 249
PHP 7.0.27-0+deb9u1
MySQL 10.1.26-MariaDB-0+deb9u1
RRDTool 1.6.0
SNMP NET-SNMP 5.7.3

====================================

[OK] Composer Version: 1.6.4
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct