Re: pre-SMTP filter not working (almost there :-) )

From: Ralf Hildebrandt (no email)
Date: Fri Mar 01 2002 - 04:19:00 EST


On Thu, Feb 28, 2002 at 07:09:33PM -0500, Theodore Knab wrote:

> What do I need to do to get procmail to filter all smtp mail ?

ALL mail? Also mail that's not delivered locally?

> mailbox_command = /usr/bin/procmail -m $h $g $u -a "$EXTENSION"

What are $h $g and $u??

> program_directory = /usr/lib/postfix message_size_limit=2004800 biff =
> no smtpd_delay_reject = no smtpd_helo_required = yes
> strict_rfc821_envelopes = yes map_rbl_domains = relays.ordb.org,
> inputs.orbz.org

Bad wrapping or an error?

> /etc/postfix/transport
> ----------------------
> #foward these ---> to
> washcoll.edu smtp:blitzhost.washcoll.edu
> washingtoncollege.net smtp:blitzhost.washcoll.edu
> washingtoncollege.org smtp:blitzhost.washcoll.edu
> washingtoncollege.edu smtp:blitzhost.washcoll.edu

Rather use:

washcoll.edu smtp:[blitzhost.washcoll.edu]
washingtoncollege.net smtp:[blitzhost.washcoll.edu]
washingtoncollege.org smtp:[blitzhost.washcoll.edu]
washingtoncollege.edu smtp:[blitzhost.washcoll.edu]

saves you MX lookups.

> /etc/procmailrc

You never listen, do you? Simply use header_checks or body_checks for
that. Piping all mail through procmail on a relay is:

a) not very security wise
b) not very fast
c) not quite easy
d) Would require local delivery on the machine or a tricky
   content_filter setup with procmail as transport
   --> has anybody done that?

   
> echo "However, it has found that your e-mail contains a";\
> echo "type of file attachment that may be a virus."; \
> echo "";\
> echo "Please update your virus scanner and scan your system.";\

This is ridiculous: You ask somebody to update THEIR scanners,
although you do scanning on the false assumption that anything *.exe
is a virus because you don't have a proper scanner?

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)   
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450 570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450 570-916
The nice thing about Windows is - It does not just crash, it displays
a dialog box and lets you press 'OK' first. 
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