Never ending - /var/qmail/bin/relaylock

[bcatl69]

Hi,

Plesk server getting these every 10-20 secs non-stop.


Sep 30 23:55:08 hostname /var/qmail/bin/relaylock[5363]: /var/qmail/bin/relaylock: mail from 188.18.78.118:3746 (not defined)
Sep 30 23:55:24 hostname /var/qmail/bin/relaylock[5384]: /var/qmail/bin/relaylock: mail from 117.204.160.212:1407 (not defined)
Sep 30 23:55:27 hostname /var/qmail/bin/relaylock[5390]: /var/qmail/bin/relaylock: mail from 211.107.153.37:4162 (not defined)
Sep 30 23:55:38 hostname /var/qmail/bin/relaylock[5412]: /var/qmail/bin/relaylock: mail from 123.21.173.168:50656 (not defined)
Sep 30 23:55:46 hostname /var/qmail/bin/relaylock[5424]: /var/qmail/bin/relaylock: mail from 58.69.150.96:1285 (58.69.150.96.pldt.net)

Anyone have any idea what might be causing this?

 

[IgorG]

It looks like attack to your mailserver from multiple IPs.
http://www.atomicorp.com/forum/viewtopic.php?p=8626&sid=95c9457f1b7df5c4c5aa6b50b7d52793

 

[bcatl69]

Thanks IgorG,

I guess no mail is actually going out from these but it's causing some load on the container though. Any thoughts on a way to curb this? Iptables maybe.