Any Way to Plug This Hole in Local Sendmail Delivery?
jeffrey at goldmark.org
Fri Apr 6 04:44:18 UTC 2007
On Apr 5, 2007, at 8:14 PM, RW wrote:
> On Thu, 5 Apr 2007 13:18:33 -0500
> Jeffrey Goldberg <jeffrey at goldmark.org> wrote:
>> The second is that the spammer could be forging in the sender
>> address (envelope FROM)
>> MAIL FROM:<user at your.domain>
>> The third type of forgery is in the header From address.
> Bear in mind that both of these are often done legitimately; for
> example by people working from home and using their ISP's server to
> send an email to a colleague.
Yes. If you set up something like this it is important to provide an
SMTP submission service. This allows your off-site users to use your
mail server by authenticating with it.
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