On Thu, 2 Sep 2021 at 19:35, Ken Johnson via mailop <mailop@mailop.org>
wrote:

> I recently needed to send a software key to a remote colleague who needed
> to
> reinstall some commercial software after re-installing Windows.  However,
> after the key failed to authorize, an investigation determined that the key
> was corrupt in the email he received from me.  The first line of the key
> was
> truncated and repeated.  This message only passes through the company email
> server, so the problem is limited in scope.  (I have transmitted the key in
> another way in the meantime.)
>
> The key is 6 lines of plain text, visible non-blank ascii characters only.
> The first line of the key is:
>
> PXP70-KK4tQ6fJQYAI32PugLL4GK9pJOZT4ocM9J0ICAoharwSAYhplSMpFm+n+b2xJ65hNI043
>
> which becomes:
>
> PXP70-KK4tQ6fJQYAI32PugLL4GK9pJOZT4ocM9J0ICAoharwSAYhplSMpFm+n+b2xJ65hNI
> PXP70-KK4tQ6fJQYAI32PugLL4GK9pJOZT4ocM9J0ICAoharwSAYhplSMpFm+n+043
>
> by the time it is delivered to my remote colleague.  This is repeatable,
> and
> this symptom also occurs if I send this key to another colleague working in
> the same remote location.  It does not occur if I send this key to myself.
> We are using different email clients.


This sounds fun :-)

What clients? That’s a wrap / repeat at 72 characters. First thoughts, is
the mail server doing any content filtering for language/prohibited content
and is assuming no body content will ever be non-breaking over 72
characters? Or it can’t cope with the pluses?

Are remote colleagues using same mail server / is it relayed for remote
access / do they use a different system? Any difference in things like
Sophos/KAV etc which might be doing client side scanning on their machine
but you don’t use?

> --
Email sent from a mobile device, please be gentle
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