Re: [exim] Strange problem with mime_acl_check.

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Author: Andrew C Aitchison
Date:  
To: kuncho pencho
CC: exim-users
Subject: Re: [exim] Strange problem with mime_acl_check.
On Fri, 15 Jan 2016, kuncho pencho wrote:

> Yes, i see but it was working til yestarday. I check this with my personal mail account and send zipped folder with files inside and pass without problem. Why is not working for my client and where should i looking for this problem?


If you zipped a large file (perhaps 1TB file of zero bytes)
the zipped file might still be quite small.
Since the original file is large, checking it could take a long time ...

Attachments like this are sometimes sent to attack a server,
or possibly to break in, if something crashes in the right way.

> >-------- Оригинално писмо --------
>
> >От: Jeremy Harris jgh@???
>
> >Относно: Re: [exim] Strange problem with mime_acl_check.
>
> >До: exim-users@???
>
> >Изпратено на: 15.01.2016 11:51
>
>
> On 15/01/16 09:16, pencho kuncho wrote:
>
>> user@??? >: host mail.example.com[1.2.3.4] said: 451
>
>> Temporary local problem - please try later (in reply to end of DATA command)
>
>> Log message is:
>
>> 2016-01-14 23:54:22 1aJppa-0000iB-39 H=(mail.host.com) [8.1.4.2] F= user@??? > temporarily rejected during MIME ACL checks: failed to expand ACL string "${if match{${run{/usr/bin/unzip -l $mime_decoded_filename}}}{\N(?i)\n.+\.(zip|exe|com|vbs|bat|pif|scr|hta|htm|html|js|cmd|chm|cpl|jsp|reg|vbe|lnk|uri|dll|sys|btm|dat|msi|prf|inf|vb|7z|gz|rar|jar|ace|url|cab)\n\N}}": command timed out
>
> [...]
>
>> 21.        condition = ${if match{${run{/usr/bin/unzip -l \

>
>
>
> ... it was running a command, unzip. And it gave up after a while,
>
> because the command did not complete.
>
> --
>
> Cheers,
>
> Jeremy
>
>
>
>
>
>
>
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>
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