I found the problem with ForceResend messages not being received. As you
suspected, the problem is NOT with ASSP. The problem is with Exchange (of
course it is, Exchange is exchange after all!).
Because a message with the same message ID and client receive time was
already received by Exchange (albeit with an attachment stripped), the
message is deleted by exchange, without notice to the user, sender, or
sending MTA. It's just categorized as a duplicate.
https://blogs.technet.microsoft.com/exchange/2004/07/14/how-does-duplicate-detection-work/
So, I can either turn off duplicate detection in Exchange (initially at
least, this seems like a bad idea) or I can change the message ID or client
send time (also worrisome). If ASSP was changed to magically alter the
message ID upon resend, that would cause threading problems right? I guess
it (or I) could slightly change the sending time. I'd love some feedback
on what you think is the best approach.
On Sat, Sep 16, 2017 at 5:55 AM, Thomas Eckardt <thomas.ecka...@thockar.com>
wrote:
> 1) X-Assp-ForceResend:YES will skip the attachment check at resend time -
> if the .eml file is removed from the resend folder by assp, the mail was
> sent by assp - check your MTA logs
>
> 2) links in PDF files are wrong if
>
> - it is a weblink with exe, bat, cmd, js, vba, wsh, ps1 - eg. a download
> to an executable file
> - it is a link to a local file: file:// - eg. an open request to a local
> file (windows will open the right app, even the file has a wrong extension)
> for example: the user got a file test.txt which is an exe file not a
> txt and stored it - than the user gets the PDF with the link to this local
> file to start it (there are group policies in AD to prevent this behavior
> in windows!!)
>
> Thomas
>
>
>
>
>
> Von: K Post <nntp.p...@gmail.com>
> An: ASSP development mailing list <assp-test@lists.sourceforge.net>
> Datum: 15.09.2017 21:04
> Betreff: [Assp-test] ForceResend blocked PDF
> ------------------------------
>
>
>
> I have a user who received an email that had a blocked PDF because of a
> link in it. The (external) user who created the PDF erroneously has a link
> in it to file:///C:/Users/Michele/Dropbox/Corresponding%
> 20Secretary/Eblasts%202017%202018/*www.an-outside-domain.com/calendar*
> <http://www.an-outside-domain.com/calendar> when she meant to do
> *www.an-outside-domain.com/calendar*
> <http://www.an-outside-domain.com/calendar>
>
>
> Questions:
>
> 1) I added X-Assp-ForceResend:YES to the top of the message and did a
> resend from the GUI. I see the message quickly hit the resendmail folder
> and then disappear as I'd expect. However, the recipient doesn't get the
> mail at all, not even with the attachment still stripped. I confirmed that
> the recipient is listed in the x-assp-intented-for header. What could I be
> missing?
>
> 2) Am I right that AFC would block a pdf with such a link in it? (I like
> that, but want to understand why this particular file is being blocked)
> The message in the .txt file is: prohibited link in PDF file
>
> THanks------------------------------------------------------
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