Hello,

I need to find out how to set up piping in Postfix.

More specifically, I want to send email to a virtual domain email
address, and then have it pipe the message into a PHP script for
parsing.  The message does not need to exist past the piping
procedure.

Right now it is so I can use Kayako's eSupport software, but also I
want to simply be able to parse some information from an email using
PHP and store it in Mysql (The parsing part is no problem; the piping
is where it is difficult)

thanks,
Tara

AFAIK you need to alter your master.cf configuration to include your
PHP script as a filter in postfix which serves your virtual domain
email. That is:

/etc/postfix/master.cf:
  # =============================================================
  # service type  private unpriv  chroot  wakeup  maxproc command
  #               (yes)   (yes)   (yes)   (never) (100)
  # =============================================================
  filter    unix  -       n       n       -        1      pipe
    flags=Rq user=filter argv=/path/to/script.php ${sender} ${recipient}

Make sure your script has #!/bin/php as first line and execution rights bit set.
For full list of options to pipe method see http://www.postfix.org/pipe.8.html

Thanks for the info...

How would I make it specific for just one virtual domain email address though?

~ Tara ~

You can try to:

1. In your /etc/postfix/main.cf add

smtpd_recipient_restrictions =
     permit_mynetworks,
     reject_unauth_destination,
     check_recipient_access hash:/etc/postfix/check_to
     
2. Create file /etc/postfix/check_to with the following content
forphpiping@domain.org     FILTER:filter

3. Note "FILTER:filter" in the file above - name "filter" denotes
string in your /etc/postfix/master.sf supplied in my previous post.


Should work ok - just change forphpiping@domain.org to your expected
address for piping. I suppose you've already read that page on how to
create the filter http://www.postfix.org/FILTER_README.html since the
parsing is not a problem for you. =)

I have tried this and it isn't working...

for virtual_mailbox_maps I'm using /etc/postfix/vmailbox
for virtual_alias_maps I'm using /etc/postfix/virtual

In my vmailbox, I have the following:
test@mynetmarketingsupport.com  /dev/null

In my master.cf, I have:
helpdesk  unix  -       n       n       -       1       pipe
  flags=Rq user=root argv=/web/helpdesk/cli/index.php ${sender} ${recipient}

In my check_to I have:
test@mynetmarketingsupport.com  FILTER:helpdesk

I of course added the entry you specified into the main.cf...

Here is the excerpt from my mail logs:
Aug 31 13:42:46 tarabyte postfix/smtpd[25099]: connect from
fed1rmmtao02.cox.net[68.230.241.37]
Aug 31 13:42:46 tarabyte postfix/smtpd[25099]: warning: SMTPD access
map hash:/etc/postfix/check_to has entry with lookup table:
FILTER:helpdesk
Aug 31 13:42:46 tarabyte postfix/smtpd[25099]: warning: do not specify
lookup tables inside SMTPD access maps
Aug 31 13:42:46 tarabyte postfix/smtpd[25099]: warning: define a
restriction class and specify its name instead.
Aug 31 13:42:46 tarabyte postfix/smtpd[25099]: NOQUEUE: reject: RCPT
from fed1rmmtao02.cox.net[68.230.241.37]: 451 Server configuration
error; from=<tara@livecreations.com>
to=<test@mynetmarketingsupport.com> proto=ESMTP
helo=<fed1rmmtao02.cox.net>

Any clue what is going on?

thanks,
Tara

Indeed, Postfix need to preload lookup table. BTW, which version do you use?
Add this to master.cf:

-----------
smtpd_restriction_classes =
   incoming_php_filter

incoming_php_filter =
   FILTER:helpdesk
-----------

and change /etc/postfix/check_to to
test@mynetmarketingsupport.com  incoming_php_filter

There seems to be another way to do the same thing without filters.
Define local adress in /etc/aliases to process email with your script
and redirect your virtual mail to it. The sequence is as follows:

1. /etc/aliases
yourtest: "|/web/helpdesk/cli/index.php"

2. /etc/postfix/virtual
test@mynetmarketingsupport.com  yourtest