Hi, I have a very strange situation with one our client. He tried to send mail to us with attachment (about 2mb, which is zipped folder with 20-30 files inside) but it's has been rejected with message:
[email protected]>: host mail.example.com[1.2.3.4] said: 451 Temporary local problem - please try later (in reply to end of DATA command) Log message is: 2016-01-14 23:54:22 1aJppa-0000iB-39 H=(mail.host.com) [8.1.4.2] F=<[email protected]> temporarily rejected during MIME ACL checks: failed to expand ACL string "${if match{${run{/usr/bin/unzip -l $mime_decoded_filename}}}{\N(?i)\n.+\.(zip|exe|com|vbs|bat|pif|scr|hta|htm|html|js|cmd|chm|cpl|jsp|reg|vbe|lnk|uri|dll|sys|btm|dat|msi|prf|inf|vb|7z|gz|rar|jar|ace|url|cab)\n\N}}": command timed out So, my config is: 0. message_size_limit = 30M 1. acl_smtp_mime = acl_check_mime 2. acl_check_mime: 3. deny message = server is busy 4. condition = ${if def:sender_host_address} 5. !authenticated = * 6. !senders = [email protected] : [email protected] : [email protected] 7. log_message = forbidden attachment: filename=$mime_filename, \ 8. content-type=$mime_content_type, recipients=$recipients 9. condition = ${if or{\ 10. {match{$mime_content_type}{(?i)executable}}\ 11. {match{$mime_filename}{\N(?i)\.(exe|com|vbs|bat|pif\ 12. |scr|hta|htm|html|js|cmd|chm|cpl|jsp|reg|vbe|lnk|uri\ 13. |dll|sys|btm|dat|msi|prf|inf|vb|7z|gz|rar|jar\ 14. |ace|zip|url|cab)\N}}}} 15. deny message = server is busy 16. condition = ${if match{$mime_filename}{\N(?i)\.zip$\N}} 17. condition = ${if def:sender_host_address} 18. !authenticated = * 19. decode = default 20. log_message = forbidden binary in attachment: filename=$mime_filename, \ recipients=$recipients 21. condition = ${if match{${run{/usr/bin/unzip -l \ 22. $mime_decoded_filename}}}\ 23. {\N(?i)\n.+\.(zip|exe|com|vbs|bat|pif|scr|hta|htm|html\ 24. |js|cmd|chm|cpl|jsp|reg|vbe|lnk|uri|dll|sys|btm|dat|msi\ 25. |prf|inf|vb|7z|gz|rar|jar|ace|url|cab)\n\N}} 26. accept Any idea? -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
