[exim] Strange exim logs

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Szerző: Abhilash S - consultorpc
Dátum:  
Címzett: exim-users
Tárgy: [exim] Strange exim logs
Hello All,


We have a server with Exim version 4.69. When we checked exim logs, there are some logs seems to be strange. They looks like:

2008-12-19 14:10:20 no IP address found for host localhost.slay.com (during SMTP connection from [127.0.0.1])
2008-12-19 14:10:21 no IP address found for host localhost.list.futurehouse.com (during SMTP connection from [127.0.0.1])
2008-12-19 14:10:21 no IP address found for host localhost.abssecurity.com (during SMTP connection from [127.0.0.1])
2008-12-19 14:10:21 no IP address found for host localhost.infodatany.com (during SMTP connection from [127.0.0.1])
2008-12-19 14:10:21 no IP address found for host localhost.worldview.com (during SMTP connection from [127.0.0.1])

Is these logs shows connection attempt from external servers? Then why it shows - (during SMTP connection from [127.0.0.1])?
We don't know where these connections are coming from, also are they harmful for our server ?

I would like to get help to understand and solve this problem. Looking forward to hear from you.

Thanks in Advance

Prince