On 2023-07-20 19:41, Eduardo Chappa wrote:
On Thu, 20 Jul 2023, [email protected] wrote:

Since I hook emails off the outlook server before the scans take place (but end up reading them after the scans have completed) I only receive the preview link (which is dead by then because the scan is complete).

If I understand you correctly, you are downloading messages out of the outlook server while the scanning process is happening. If this is the case, you are seeing that your actions and those of the server are incompatible, and one has to stop so you can resume handling your email properly.

This is called "ATP dynamic delivery"; I just noticed a thread about it in the Fetchmail-users mail list, with some more details (but not enough yet):

From: [email protected]
To: [email protected]
Date: Thu, 27 Jul 2023 08:25:12 +0100
Message-ID: <5851305.MhkbZ0Pkbq@lunesta>
Subject: [Fetchmail-users] ATP dynamic delivery
List-Id: "general discussion on fetchmail, its use,
 and support" <fetchmail-users.lists.sourceforge.net>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=fetchmail-users>


Link to thread:

<https://sourceforge.net/p/fetchmail/mailman/fetchmail-users/thread/5851305.MhkbZ0Pkbq%40lunesta/#msg37876562>


Fortunately I do not have this issue, so I would not know how to stop in on the Outlook side. My hunch is that this is an administrator decision pushed on you, and you cannot disable it, so the only thing left to do is to change your flow of work. Here are some suggestions that you can explore:

Change the server delivery policy to "replace" instead of "dynamic"


The idea on what to do next seems to be to locate a header or something to know if a message contains those previews, then don't download it (talking of fetchmail), till the message is complete. But they don't know if it will have the same UID.


But this finding out needs some user with access (as client at least) to such a server, so that's you, superaorta ;-)


You could also try with Thunderbird.

--
Cheers / Saludos,

                Carlos E. R.
                (from 15.4 x86_64 at Telcontar)

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