SMTP attack!

HCL Domino Domino Forum
1

Every 30 seconds, it seems some server is connecting to mine and trying to deliver a message to a bogus recipient (which changes every time and is never real - below for example it is “path76”)… the sample log entries below repeat every 30 seconds!

What the??? How do I stop this nonsense?

09/09/2008 01:44:53 AM SMTP Server: notes.myserver.com (127.0.0.1) disconnected. 0 message[s] received

09/09/2008 01:45:19 AM SMTP Server: notes.myserver.com (127.0.0.1) connected

09/09/2008 01:45:20 AM SMTP Server: Mail for path76@mydomain.com rejected for policy reasons. Recipient could not be found in the Domino Directory.

2

Subject: SMTP attack!

You HAVE stopped the attack. The message is rejected. But you already know that.

What, if anything, are you using for an anti-spam solution? If you want to stop the connection attempts from eating bandwidth, then your best bet is to sign your domain up with an outsourced anti-spam service like Postini.