I provide email forwarding for about 100 friends and friends-of-friends
and am currently moving things to a new server to put online next month (I
push maybe 3500 emails/day through the system).
Currently, I have a procmail rule that reads in a text file of
"whitelisted" and "blacklisted" addresses and either forwards them before
SA filters them or in the case of a blacklist, dumps them to /dev/null.
The contents of these files are based on entries users make in a simple
web interface and then the middleware creates a text file of the addys.
However, it'd be cool to use the built in whitelist/blacklist features of
SA instead of this outside check. Where I'm falling down us easy
command-line calls to display the contents of the black/white lists as
well as remove blacklist addys (since there are command-line arguments to
add/remove whitelist entries).
This system is still being set up, so I can change easily.
---
Basicly, what I'm doing current is using a systemwide aliases file to call
procmail once postfix takes care of processing the email and handling it
off for local delivery, like this for an example user named "ribbit".
/etc/aliases
ribbit: "|/usr/bin/procmail -m /var/virtualusers/procmailrc ribbit [EMAIL
PROTECTED]"
and then the /var/virtualusers/procmailrc is as follows
# set up some variables
WHITELIST=/var/virtualusers/$1.whitelist
BLACKLIST=/var/virtualusers/$1.blacklist
#
# Check against Whitelist
#
:0
* ? formail -x"From" -x"From:" -x"Sender:"\
| fgrep -is -f $WHITELIST
! $2
#
# Check against Blacklist
#
:0
* ? formail -x"From" -x"From:" -x"Sender:"\
| fgrep -is -f $BLACKLIST
/dev/null
# Pipe remaining email to spamc if under 256k
:0fw
* < 256000
| /usr/bin/spamc -f -u $1
:0e
{
EXITCODE=$?
}
# Forward post-processed remaining email on to the forward address
:0
{
:0
! $2
}
---
Essentially, the contents of $WHITELIST and $BLACKLIST are just a text
file with one address per line to check against.
I don't claim this is the "best" way, or even a "good" way and certainly
isn't efficient, but I'm not an very good admin and an even worse
programmer, so making it work for my 100 or so users that I forward email
for is the primary goal. The new box is a 2.4GHz Intel with 1.5GB of
ram, so efficiency isn't that important; the current is a dual 1GHz with
1GB and it's handling this miniscule load just fine.
Please me gentle to me in your replies :-)
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