> I want to block all the mails containing
> .exe(attachment) So for that i used that in my exim file
>
> acl_check_mime:
>
> # File extension filtering.
> deny message = Blacklisted file extension detected
> condition = ${if match \
> {${lc:$mime_filename}} \
> {\N(\.exe|\.pif|\.bat|\.scr|\.lnk|\.com)$\N} \
> {1}{0}}
>
> But now my problem is that many of user is sending .exe inside the .zip
> file, Please Guide me how can i block that mails.
The path /usr/local/bin/unzip is for FreeBSD:
acl_smtp_mime = acl_check_mime
begin acl
acl_check_mime:
deny message = A .zip attachment contains a Windows-executable file - \
blocked because we are afraid of new viruses \
not recognized [yet] by antiviruses.
condition = ${if match{$mime_filename}{\N(?i)\.zip$\N}}
condition = ${if def:sender_host_address}
!authenticated = *
decode = default
log_message = forbidden binary in attachment: filename=$mime_filename, \
recipients=$recipients
condition = ${if match{${run{/usr/local/bin/unzip -l \
$mime_decoded_filename}}}\
{\N(?i)\.(exe|com|vbs|bat|pif|scr|hta|js\
|cmd|chm|cpl|jsp|reg|vbe|lnk|dll|sys|btm|dat|msi|prf|vb)\n\N}}
deny message = Windows-executable attachments forbidden because we are \
afraid of new viruses not recognized [yet] by antiviruses.
condition = ${if def:sender_host_address}
!authenticated = *
log_message = forbidden attachment: filename=$mime_filename, \
content-type=$mime_content_type, recipients=$recipients
condition = ${if or{\
{match{$mime_content_type}{(?i)executable}}\
{match{$mime_filename}{\N(?i)\.(exe|com|vbs|bat|pif\
|scr|hta|js|cmd|chm|cpl|jsp|reg|vbe|lnk|dll|sys|btm|dat|msi|prf|vb)$\N}}\
}}
accept
