Hi all, Just checking if anyone can provide any hints on the below.
Thanx, Alex On Tue, Mar 6, 2018 at 3:16 PM, Alex K <rightkickt...@gmail.com> wrote: > Hi all, > > I am trying to setup a simple script, which will be used to check the mail > size and count the emails per user (the script does only mail size checks > at the moment). I am currently checking the logic with a simple script and > I have followed the http://www.postfix.org/FILTER_README.html, the > advanced option to avoid loops. When putting script at pickup I had loops. > > I don't understand what I am doing wrong and I get from postfix: > > postfix/qmgr[2389]: 8A792402D3: from=<r...@ohub.com>, size=269, nrcpt=1 > (queue active) > Mar 6 10:55:25 ohub-dev postfix/smtp[9895]: 8A792402D3: lost connection > with localhost[::1] while receiving the initial server greeting > Mar 6 10:55:25 ohub-dev postfix/smtp[9895]: 8A792402D3: to=< > gu...@ohub.com>, orig_to=<guest>, relay=localhost[127.0.0.1]:10025, > delay=0.06, delays=0.04/0.01/0.01/0, dsn=4.4.2, status=deferred (lost > connection with localhost[127.0.0.1] while receiving the initial server > greeting) > > The above email is sent with the command: echo "test" | mail -s "test" > guest > > I have postfix 2.9.6-2 and I have done the following: > > /etc/postfix/main.cf: > content_filter = scan:localhost:10025 > receive_override_options = no_address_mappings > > /etc/postfix/master.cf > # Filter > scan unix - - n - 10 smtp > -o smtp_send_xforward_command=yes > -o disable_mime_output_conversion=yes > -o smtp_generic_maps= > # > localhost:10025 inet n n n - 10 spawn > user=filter argv=/usr/bin/filter localhost 10026 > # > localhost:10026 inet n - n - 10 smtpd > -o content_filter= > -o receive_override_options=no_unknown_recipient_checks,no_head > er_body_checks,no_milters > -o smtpd_helo_restrictions= > -o smtpd_client_restrictions= > -o smtpd_sender_restrictions= > > > The script I am using is working ok when invoked from sender access and > defined at master.cf as: > filter unix - n n - 10 pipe > flags=Rq user=filter argv=/usr/bin/mail_filter.php ${sender} -- > ${recipient} ${size} > > I understand that now I am using spawn and seems to behave differently > from pipe mechanism but I have not been able to understand what is required > in the script so as to process email and then send it back to > localhost:10026 for further delivery. > > The script (further down) is using sendmail to return the mail back and > the returned email as I understand is received from pickup. It seems also > that with spawn I don't have the ${sender} -- ${recipient} ${size} macros > available even when defined at options as below: > > localhost:10025 inet n n n - 10 spawn > user=filter argv=/usr/bin/filter ${sender} -- ${recipient} ${size} > localhost 10026 > > > I will greatly appreciate any help as I am stuck on how to proceed and did > not manage to find any pointers. > > Alex > > > Script: > #!/bin/bash > # Simple mail size filtering script > > INSPECT_DIR=/var/spool/filter > SENDMAIL="/usr/sbin/sendmail -G -i -f " # NEVER NEVER NEVER use "-t" here. > > # VIP Account username and message size limit: > VIP_USER="vip" > VIP_LIMIT=5000000 # bytes > > # User Message size limit > USER_LIMIT=100000 # bytes > > # Return message to sender > message='Quota exceeded' > > # Exit codes from <sysexits.h> > EX_TEMPFAIL=75 > EX_NOPERM=77 > EX_UNAVAILABLE=69 > > # Find out the ammount of arguments passed > args=("$@") > length=$# > > # Find out the sender > SENDER=${args[0]} > > # Extract recipients > RECIPIENTS=${args[@]:2:$(($length - 3))} > > # Extract message size (last argument) > MESSAGE_SIZE=${args[@]:(-1)} > > # Clean up when done or when aborting. > trap "rm -f in.$$" 0 1 2 3 15 > > # Set time stamp > timestamp=`date +"%d-%m-%Y %H:%M"` > > # Start processing. > cd $INSPECT_DIR || { > echo $INSPECT_DIR does not exist; exit $EX_TEMPFAIL; } > > cat >in.$$ || { > echo Cannot save mail to file; exit $EX_TEMPFAIL; } > > # Check who is the sender and apply policy accordingly > USER=`/bin/echo $SENDER | awk -F "@" '{print$1}'` > echo "USER: " $USER >> /var/log/filter > > case $USER in > $VIP_USER) # Limit VIP account > if [ $MESSAGE_SIZE -gt $VIP_LIMIT ]; then > echo "${message}"; > echo "$timestamp: Message size exceeded from " $SENDER >> > /var/log/filter; > exit $EX_NOPERM; > else > echo "Business Mail size OK" >> /var/log/filter; > $SENDMAIL $SENDER $RECIPIENTS <in.$$ > fi > ;; > *) # Limit User Mails > if [ $MESSAGE_SIZE -gt $USER_LIMIT ]; then > echo "${message}"; > echo "$timestamp: Message size exceeded from " $SENDER >> > /var/log/filter; > exit $EX_NOPERM; > else > echo "User Mail size OK" >> /var/log/filter; > $SENDMAIL $SENDER $RECIPIENTS <in.$$ > fi > ;; > esac > exit $? > > >
