I'm completely new to qmail, and I've read the man pages on condredirect but
I'm having no luck getting this to work. If someone could please enlighten
me, I would be forever grateful.
Facts: I'm running qmail 1.03 on a RH 7.0 box.
Problem: I copied the following program into /var/qmail/bin/checkattach:
____________________________________________________________________________
___
#!/bin/sh
#
# qmail -- checkattach
# Author: Noel G. Mistula <[EMAIL PROTECTED]>
# Date: 28 June 1999 Version: 0.1
# I appreciate any comment to this quick and dirty way of filtering
attachment.
#
# Modified: 7 July 1999 Version: 0.3
# Modified: 7 May 2000 Version: 0.4
# This is release under the GNU/GPL.
# This is a very crude program. Use at your own risk.
# This will bounce incoming email with executable,
# video and other attachments. Just remove/add
# whichever filetype (e.g. EXE, AVI, COM) is required.
#
# I use this in a user's .qmail file
# by adding the line
# |/usr/local/bin/checkattach
# before the ./Maildir/
#
# Make sure to chmod 555 /usr/local/bin/checkattach
# so that qmail users can execute it.
# Start program here.
### This part is the new version (ver. 0.3)
printmsg () {
echo "The reason your email was rejected is you sent an attachment that can
cause problems."
echo "Sorry, the attachment you sent is in violation of our company's
policy because it can cause problems like virus, or increase traffic load,
or delete file(s) and/or among others."
echo "Please disable HTML formatting when sending email because Visual
Basic Script Worms/Virus normally exploits this."
echo "--- Attachment filetype you sent is $ATTYPE"
}
#
# Check for NOT allowed attachment.
# Here you can include more filetype you want.
#
checktype () {
case $ATTYPE in
VBS | VBE | JSE | CSS | WSH | SCT | HTA | VXD | EXE | HTM |
DOT | HLP | PAK | DAT | PCX | PPS | COM | BAT | CMD | AVI | MOV | RAM | OCX
| CAB | SHS | CLA | RA | BMP | MPE | MPG | MP3 | MP4 | WAV | AUD | AU | DLL)
printmsg $ATTYPE
exit 100;;
*)
;;
esac
}
#ATTACHTYPE=`grep "filename=" - | gawk '{split($NF, results, ".");
r=toupper(results[2]); print r}' | cut -c -3`
####Below doesn't work if more than 2 fields in name=
#ATTACHTYPE=`grep "name=" - | gawk '{split($NF, results, ".");
r=toupper(results[3]); print r}' | cut -c -3`
#### End of ver. 0.3
####Below works OK
## This part is recently modified (7may2000) because I noticed that the gawk
part in the
## ATTACHTYPE above, doesn't properly check when you have a filename like
## THIS.IS.A.VBS.VIRUS.txt.vbs
## The ATTACHTYPE below resolves this problem ;).
ATTACHTYPE=`grep "name=" - | gawk 'BEGIN {FS="."}; {print toupper($NF)}' |
cut -c -3`
for ATTYPE in $ATTACHTYPE
do
checktype $ATTYPE
done
#### End of ver. 0.4
exit 0
____________________________________________________________________________
________________________
I then added a .qmail file with the following information in user's home
directories:
|condredirect [EMAIL PROTECTED] /var/qmail/bin/checkattach
./Maildir/
My problem is that it is redirecting everything to the address to be
forwarded to, not just the emails with attachments. What's up with this and
why is it happening? Like I said -- I'm new to qmail and I've read the man
pages and I'm just not having any luck with this. It is probably something
very simple, and I would really appreciate it if someone could explain it to
me.
Joy Hundley
