From: Jean-Yves Avenard (jyavenardgmail.com)
Date: Mon Aug 30 2010 - 08:18:36 CDT

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Hi again

On 30 August 2010 22:56, Jean-Yves Avenard <jyavenardgmail.com> wrote:
> 4- I have added in sendmail a very simple rule allowing to create
> dummy email address such as:
> reg-username-serverdomain.com
>
> this is equivalent to usernamedomain.com
>
> In sendmail, I would ad in the main .mc file:
>
> LOCAL_CONFIG
> Klist regex -s2,1,3 -d+ ^(reg)-(.+)-(.+)$$
> LOCAL_RULE_0
> R$+ < $=w . > $: $(list $1 $: $1 $) < $2 . >
>
> I thought I could add something like this in the canonical file:
> /^(reg)-(.*)-(.*)$/ ${2}
>
> However, I read in a few place that this would break recipient validation.

Should add that while with the canonical above I do get the email to
the proper mailbox delivered, the recipient is being rewritten to the
simple form instead.
so if I send to reg-jya-likelyspammerdomain.com, the recipient I can
see in the mail client is jyadomain.com

And I loose the whole idea I had to start with, which was to be able
to identify who is the one spamming and leaked the submitted email
address.

JY

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