[CentOS] dealing with spoofing

m.roth at 5-cent.us m.roth at 5-cent.us
Wed Aug 31 20:33:49 UTC 2011


Josh Miller wrote:
> On 08/31/2011 01:27 PM, m.roth at 5-cent.us wrote:
>> Stephen Harris wrote:
>>>> Here's a thought I just thunk, folks: some scum, apparently in eastern
>>>> Europe, has harvested my email, and is using it in the Reply-To: in
>>>> its spamming efforts. Now, I realize that some mails go out from
<snip>
>>> Anyway, the SMTP server should send the delivery failure to the
>>> envelope address, which may be different to both the From and Reply-To
>>> addresses.
>>>
>> That would be lovely. Unfortunately, a high percentage seem to use the
>> Reply-To address. Trust me, the last four or five months, I've gotten
>
> The Reply-To address is an optional component of the email header and is
> not used in email routing by mail servers.

I'm well aware that it's an optional component.
<snip>
> Mail server will send NDRs (non-delivery receipts) back to the envelope
> sender every time with no regard for From or Reply-To.

You're saying it uses the envelope, not if exists Reply-To, else From? The
problem I have with that is that a few of them have returned the email,
with full headers, and I see the *only* reference to my email address is
in the Reply-To.

        mark




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