Resubmission after N days

[Thomas Güttler]

Am 06.02.2015 um 08:52 schrieb Steffen Kaiser:
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> On Thu, 5 Feb 2015, Thomas Güttler wrote:
>> Am 05.02.2015 um 12:18 schrieb Steffen Kaiser:
>>> On Thu, 5 Feb 2015, Thomas Güttler wrote:
>>>>> What specific action shall be done via IMAP? The move?
>>>>> Then use any IMAP client library, use the LIST command to get the mailboxes, FETCH to get the messages and
>>>>> COPY/EXPUNGE
>>>>> to move them.
>>>
>>>> You are right moving the mail should be simple.
>>>
>>>> I ask myself it is possible to store the date of the resubmission in the mail itself.
>>>
>>> How shall the date be visible to the user?
>>>
>>> Remember that altering the message may invalidate DKIM and other security / verification stuff.
>>>
>>> Instead of a simple "mv" you can prefix the message with "X-Date: " header, so you mark the message, but it is not
>>> visible to the user.
>>>
>>> If your goal is to have the message "up" according the client side message sorting by date, you would need to alter
>>> the Date: header and possibly break message verification.
>>>
>>> What's your goal in order to " store the date of the resubmission "?
>>
>> My goal is to use IMAP only, not external database. But I guess this is not possible.
>
> Maybe I rephrase: How should the Resubmission interfaces to the users, how shall the users work with it?
> The first sentence of the quoted text contains an IMAP-only variant. However, pick up Håkon's advice and use STORE to
> remove the SEEN flag.
> So I wonder how the Resubmission shall work.

me too. That's why I asked the question on this list. Sad but true, I guess there is no solution.
Thank you very much for your feedback.

Regards,
   Thomas