> а если хочу отредактировать прямо в файле?
Exim позволяет во время приема письма
раскодировать MIME-часть письма (decode)
или раскодировать и сканировать ее (mime_regex),
но не редактировать.
Примеры:
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}}\
}}
deny message = Blocked as Vietnamese spam from gmail
condition = ${if match{$sender_host_name}\
{\N^mail-[\w-]+\.google\.com$\N}}
condition = ${if eq{$mime_content_type}{text/plain}}
condition = ${if eqi{$mime_charset}{UTF-8}}
mime_regex =
\N([\x01-\x7f](\xe1(\xba[\xa1-\xa3\xa5\xa6\xa8\xab\xad\xb6\xbe\xbf]|\xbb[\x81\x82\x85-\x87\x89-\x92\x97\x99-\x9c\xaa\xab\xad\xb0\xb1])|\xc3[\xaa\xa2\xb4]\xcc[\x81\x83\x89])[\x01-\x7f].*?){3}
accept
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