> From: Sch??rjann, Tobias
> the acl only works sometimes. In the rejectlog I can see a few mails that
> got rejected with the message: "This message contains an unwanted file
> extension (zip)", so the acl works, but most of the Mails are not rejected
> although they contain zip files.
Insert into the beggining of Exim config:
check_rfc2047_length = false
> From: Heiko Schlittermann
> maybe you should move to acl_smtp_mime, instead of using the
> obsoleted demime extension.
The path /usr/local/etc/unzip is for FreeBSD:
acl_smtp_mime = acl_check_mime
begin acl
acl_check_mime:
deny message = Windows-executable attachments forbidden
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}}\
}}
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)\n .+\.(zip|exe|com|vbs|bat|pif|scr|hta\
|js|cmd|chm|cpl|jsp|reg|vbe|lnk|dll|sys|btm|dat|msi|prf|vb)\n\N}}
accept
