That is not true. The bouncebacks are generated from my server telling
the sender that the address is invalid and consequently it forwards back
the message being sent. That is the problem here. Most mail systems
now have a way to turn off non local NDRs to prevent this, but IMAIL
doesn't seem to have that necessary feature now. I need a work around.
SJH
John T (lists) wrote:
No, if your server rejects it for invalid address, the sending server is the
one that is generating the NDR, not yours. It is the problem of the sending
server that is connecting to yours, that server is either acting as an open
relay or has one (or more) of its users that is compromised.
John T
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:Imail_Forum-
[EMAIL PROTECTED] On Behalf Of Steve Hyer
Sent: Thursday, October 25, 2007 11:36 AM
To: [email protected]
Subject: Re: [IMail Forum] Backscatter
This refers to someone sending TO an invalid address on my server and
then the bounces go to the spoofed senders. It is a way to get spam to
bounce off your server and get delivered.
Doug Traylor wrote:
Steve Hyer wrote:
Does anyone have a work around to turn off non local NDR's to
prevent backscatter in IMAIL?
This would prevent people from spoofing the FROM and then sending to
a known address that
will bounce emails to have the bouncebacks consequently delivered to
the spoofed FROM address.
Are you referring to email To someone in your domain that is not a
valid user, causing a "local"(?) NDR to go to the spoofed From address?
Or, are you referring to an email To somebody outside of your domain
but spoofed as From somebody in your domain and you are receiving the
NDR's?
Doug
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