Have a look at a few. I bet they are bounce messages, perfectly legal. Not
AUTH'd because they are inbound.

Dan

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Len Conrad
Sent: Monday, November 01, 2004 5:34 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] SMTP Auth question and logs



>The SMTP Remote senders report is showing thousands of '<>' senders

I bet once SMTP AUTH is done, no more filtering is applied to the session's
traffic.  The whole point of SMTP AUTH is that you trust the IP, so why
filter? The only filtering would be virus scanning, but not from/to/content
filtering.

Can't your reporting show traffic per IP?  so you can see if the null
sender traffic is from one IP (abuse) or from many IPs?

Len


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