[Mailman-Users] Which user is harvesting sender emails?

[Jim Popovitch]

On Fri, Aug 19, 2016 at 10:21 AM, Bill Cole
<mailmanu-20150316 at billmail.scconsult.com> wrote:
> On 18 Aug 2016, at 19:36, Mark Sapiro wrote:
>
>> Altering the From: based on recipient can be done by modifying the code.
>> Say you have a message "From: Ann User <ann at example.com>" and you want
>> to change that to "From: Ann User <ann+xxx at example.com>" where xxx is a
>> unique code for each recipient.
>
>
> Please, don't anyone do that, ever. It's not just "risky," as noted in
> earlier discussion, it would be positively abusive.
>
> A less obvious approach would be to add an address IN A DOMAIN YOU CONTROL
> in a X-[something] header (or perhaps a Cc header) that is unique to each
> recipient so that when you get mail to that address, you've identified your
> problem user.

PRVS/BATV

-Jim P.