Thanks for the information.
What I needed to do was something along these lines - except that images would be deposited in the directories of the senders.
Could this work on ISPConfig?
I found this in the listing:
If you're creating a dedicated mailbox for this purpose, using a filtering mechanism is almost definitely not what you want. Instead, you want to have the mailbox be a pipe to the application, and have the application simply read in the message from stdin, parse out the body, and MIME parse the body to get the attachments.
Having a mailbox be a pipe is supported by all the popular unix-based MTAs that I know of, such as sendmail, postfix, and qmail. Generally you define it in your aliases file, like so:
# sendmail or postfix syntax
msgsubmit: "| /usr/bin/php ~path/to/example.php"
Then mails to msgsubmit@ get routed to a php program for delivery.
This has the advantage of not relying on an IMAP server or any other server beyond the MTA being alive, and it works fine as long as you have control over the MTA of the destination host. Filtering is what you'd want if you wanted all messages on a system to be inspected by the script, which I'm guessing is not the case.
If you want a copy kept in a mailbox somewhere (not a bad idea) simply define the alias to go to multiple addresses, like so:
msgsubmit: "| /usr/bin/php ~path/to/example.php", msgsubmit-box
Or postfix virtual format:
"| /usr/bin/php ~path/to/example.php"
The item above says to create an Alias as a pipe. How can one execute this instruction in ISPConfig?