Filename Blocking Issue

Gottschalk, David dgottsc at
Tue Apr 6 21:45:22 IST 2010

I have a strange issue with filenames being blocked that I have disabled.

It appears that double file extensions are being blocked within .zip files, but not if they are not in a zip archive. I've disabled them in the filename.rules.conf with:

# Deny all other double file extensions. This catches any hidden filenames.
#deny   \.[a-z][a-z0-9]{2,3}\s*\.[a-z0-9]{3}$   Found possible filename hiding                          Attempt to hide real filename extension

I changed this to allow, but the same issue occurred. Is this a bug, or am I missing something obvious? I couldn't find anything regarding this issue on the list.

Here is a example of a message being blocked.

Apr  1 15:08:00 [] o31J7xJu028562: from=<removed>, size=219934, class=0, nrcpts=1, msgid=<removed>, proto=ESMTP, daemon=SMTP_TLSAUTH, relay=removed
Apr  1 15:08:00 MailScanner: [] Filename Checks: Found possible filename hiding (o31J7xJu028562 rdf.tex.bak)
Apr  1 15:08:01 MailScanner: [mail.notice] Saved infected "rdf.tex.bak" to /mailscanner/MailScanner/quarantine/20100401/o31J7xJu028562
Apr  1 15:08:01 MailScanner: [mail.notice] Saved infected "" to /mailscanner/MailScanner/quarantine/20100401/o31J7xJu028562
Apr  1 15:08:01 MailScanner: [] Message o31J7xJu028562 from removed (removed) to is too big for spam checks (220506 > 150000 bytes)

Thanks for any help that can be provided.

David Gottschalk
UTS Email team
david.gottschalk at

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