[Exim] autoreply transport

I try to make an autoreply transport for people on holiday.

I have the following configuration file:

TRANSPORT_VACANCES:
driver = autoreply
from = $local_part@$domain
to = $sender_address
subject = "vacation"
text = ${lookup ldap {user=LDAPUSER pass=PASSWORD
ldap:///c=fr?autoreplymessage?sub?(mail=MAIL)}{$value} fail }
user = e-tera

DIRECTOR_VACANCES:
driver = smartuser
condition = ${if eq{${lookup ldap{user=LDAPUSER pass=PASSWORD
ldap:///c=fr?autoreply?sub?(mail=MAIL)}{$value}fail}}{vacation}{y
es}{no}}
transport = TRANSPORT_VACANCES
unseen

It seems to work well, but when I look in eximon, i have the following
lines :

16:28:23 12pAzn-000206-00 <= yann.algayon@??? H=test.e-tera.com
(e-tera.com) [212.155.165.19] U=root P=esmtp S=563
id=39181FF4.E0836346@???
16:28:23 12pAzn-000206-00 => titi.tutu <titi.tutu@???>
D=system_aliases T=local_delivery
16:28:23 12pAzn-00020A-00 <= e-tera@??? R=12pAzn-000206-00
U=e-tera P=local S=411
16:28:23 12pAzn-000206-00 => titi.tutu <titi.tutu@???>
D=director_vacances T=transport_vacances
16:28:23 12pAzn-000206-00 Completed
16:28:23 12pAzn-00020A-00 => yann.algayon <yann.algayon@???>
D=system_aliases T=local_delivery
16:28:23 12pAzn-00020A-00 Completed

I don't understand the third line. What is this incoming mail from
e-tera@??? ?

Yann Algayon