On 29/09/2019 11:46, Eike Rathke wrote:
> Hi,
>
> On Sunday, 2019-09-29 09:55:54 +0200, Daniel Pocock wrote:
>
>> d) but [email protected] is the address that is really subscribed
>> e) [email protected] appears in the headers of messages they receive
>> f) internally, posteo.de was swapping the addresses in the headers and
>> not keeping any record of the original destination [email protected].
>
> posteo.de does not "swap" addresses in headers. It adds a Delivered-To
> header with the main [email protected] account address as that is what it
> delivers to and all other addresses are just aliases of the main
> addresses.
>
> The original destination address is tracked in the Received headers, as
> soon as the message enters the posteo.de system it is delivered to the
> account's main address.
>
> Received: from mx01.posteo.de ... for <[email protected]>
> Received: from [...externalsystem...] ... by mx01.posteo.de ... for
> <[email protected]>
>
In the example provided to me by a posteo.de user, that was not the
case. The foo3 address was missing from all the headers.
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