Re: [exim] Problem with filter on Base64-encoded subject field

[Jeremy Harris via Exim-users]

On 15/12/2020 18:13, Andreas Metzler via Exim-users wrote:

On 2020-12-15 Kirill Sluchanko via Exim-users <exim-users@exim.org> wrote:
[...]

     Subject: 
=?UTF-8?B?UmU6IFtFWFRFUk5BTF0gUmU6IFJlOiBSZTog0JzQsNGA0YjRgNGD0YLQuNC30LDRhtC4?=
 я почты

[...]

     echo   
UmU6IFtFWFRFUk5BTF0gUmU6IFJlOiBSZTog0JzQsNGA0YjRgNGD0YLQuNC30LDRhtC4 | base64 -d

and it works fine:     Re: [EXTERNAL] Re: Re: Re: Маршрутизаци

Your decoding test was only applied to the =?UTF-8?...?= part but the
rest of the header contains non-ASCII characters which are not even
valid UTF8. It could be that exims match function never matches on invalid
strings.

I'm paranoid enough to want to start checking exactly what was received
on the wire for that header, in case there's a buffer malfunction in exim's
code...
--
Cheers,
  Jeremy

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