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# Exim filter if not first_delivery then finish endif # Ignore "real" errors if error_message and $header_from: contains "Mailer-Daemon@" then finish endif # Check Content-Type header using quoted filename [content_type_quoted_fn_match] if $header_content-type: matches "(?:file)?name=(\"[^\"]+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc])\")" then fail text "This message has been rejected because it has\n\ potentially executable content $1\n\ This form of attachment has been used by\n\ recent viruses or other malware.\n\ If you meant to send this file then please\n\ package it up as a zip file and resend it." seen finish endif # same again using unquoted filename [content_type_unquoted_fn_match] if $header_content-type: matches "(?:file)?name=(\\\\S+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc]))([\\\\s;]|\\$)" then fail text "This message has been rejected because it has\n\ potentially executable content $1\n\ This form of attachment has been used by\n\ recent viruses or other malware.\n\ If you meant to send this file then please\n\ package it up as a zip file and resend it." seen finish endif # Quoted filename - [body_quoted_fn_match] if $message_body matches "(?:Content-(?:Type:(?>\\\\s*)[\\\\w-]+/[\\\\w-]+|Disposition:(?>\\\\s*)attachment);(?>\\\\s*)(?:file)?name=|begin(?>\\\\s+)[0-7]{3,4}(?>\\\\s+))(\"[^\"]+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc])\")[\\\\s;]" then fail text "This message has been rejected because it has\n\ a potentially executable attachment $1\n\ This form of attachment has been used by\n\ recent viruses or other malware.\n\ If you meant to send this file then please\n\ package it up as a zip file and resend it." seen finish endif # same again using unquoted filename [body_unquoted_fn_match] if $message_body matches "(?:Content-(?:Type:(?>\\\\s*)[\\\\w-]+/[\\\\w-]+|Disposition:(?>\\\\s*)attachment);(?>\\\\s*)(?:file)?name=|begin(?>\\\\s+)[0-7]{3,4}(?>\\\\s+))(\\\\S+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc]))[\\\\s;]" then fail text "This message has been rejected because it has\n\ a potentially executable attachment $1\n\ This form of attachment has been used by\n\ recent viruses or other malware.\n\ If you meant to send this file then please\n\ package it up as a zip file and resend it." seen finish endif ## ----------------------------------------------------------------------- if "${if def:header_X-Spam-Subject: {there}}" is there then headers remove Subject headers add "Subject: $rh_X-Spam-Subject:" headers remove X-Spam-Subject endif