postfix-users October 2010 archive
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postfix-users: Re: question about notifications

Re: question about notifications

From: Jeroen Geilman <jeroen_at_nospam>
Date: Wed Oct 20 2010 - 19:19:51 GMT

On 10/20/2010 09:04 PM, John Watson wrote:
> Hello,
> I am using postfix in conjunction with squirrelmail to build a
> business application. One of the requirements that I have is that when
> an email is received in one of the postfix mail boxes an alert is
> generated. In our case we will be sending a standard message to
> another email but in general we might want to run arbitrary code when
> messages are received by postfix.

To send a copy of all mail to additional recipients, see always_bcc:

> It seems that some of the work that has been done with virus scanners
> uses a server hook to examine all the messages that pass through the
> server. Can anyone tell me what that is called or provide a pointer to
> more detail and is this the best way to solve a problem like this?

You're probably talking about content_filter, but there are in fact
many, many ways to implement such a scenario.

My choice would be one of:

- always_bcc to a local command alias
- always_bcc to a custom pipe(8) transport

The latter has the most flexibility in the command(s) executed - you can
execute basically anything your system has (but not as root), with all
relevant message parameters as variables to pass to the command(s).


Architecture overview - do not skip this!

Local delivery and command execution:

Transport maps and manipulation :

Pipe(8) command delivery:

-- J.