Re: [exim] Lack of demime support in latest verstion + more.

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Autor: Lena
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A: exim-users
Assumpte: Re: [exim] Lack of demime support in latest verstion + more.
Instead of demime and clamav: :)

P7ZIP = /usr/local/bin/7z
# port archivers/p7zip in case of FreeBSD
BINFORBIDDEN = Windows-executable attachments forbidden
WINBIN = exe|com|js|pif|scr|bat|jse|cpl|vbe|vbs|ace
# more cautious: exe|com|js|pif|scr|bat|flv|reg|btm|chm|cmd|cpl|dat|dll|hta|jse|jsp|lnk|msi|prf|sys|vb|vbe|vbs|ace
# WinRAR can uncompress .ace, so trojans are sometimes compressed .ace
COMPREXT = zip|rar|7z|arj|bz2|gz|uue|xz|z
check_rfc2047_length = false
acl_smtp_mime = acl_check_mime
begin acl
acl_check_mime:
  deny message = BINFORBIDDEN
       log_message = forbidden attachment: filename=$mime_filename, \
                     content-type=$mime_content_type, recipients=$recipients
       condition = ${if or{\
        {match{$mime_content_type}\
              {(?i)executable|application/x-ace-compressed}}\
        {match{$mime_filename}{\N(?i)\.(WINBIN)(\.(COMPREXT))*$\N}}\
                          }}


  deny message = Compressed BINFORBIDDEN
       condition = ${if or{\
                           {match{$mime_content_type}{(?i)application/\
                                     (octet-stream|x(-zip)?-compressed|zip)}}\
                           {match{$mime_filename}{\N(?i)\.(COMPREXT)$\N}}\
                          }}
       condition = ${if <{$message_size}{1500K}}
       decode = default
       log_message = forbidden binary in attachment: filename=$mime_filename, \
                     recipients=$recipients
       condition = ${if match{${run{P7ZIP l -y $mime_decoded_filename}}}\
                             {\N(?i)\n[12].+\.(COMPREXT|WINBIN)\n\N}}


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