Procmail and piping to scripts

HelenaGwyn

In my quest to become more autonomous regarding my data, I want to implement some sort of "newsletter to RSS"-feature on top of my self-hosted FreshRSS. I came across https://github.com/remko/atomail who pipes mail to a python-script in a procmail-rule.

:0
* ^TO_somemailinglist@example.com
| atomail.py --title 'Some Mailinglist' --uri='http://mysite.com/somemailinglist.xml' --strip-subjects $HOME/public_html/somemailinglist.xml

Is this possible on Opalstack?

sean

HelenaGwyn No, you cannot use procmail to pipe mail to a script on our platform. Instead, you can use our imap2script utility to fetch mail from a mailbox and then pipe that to a script.

Instructions are available in our user guide at: Processing messages with a script or program

HelenaGwyn

sean

Is it possible to have procmail move incoming emails to a folder based upon part of the recipient's address and possibly create this folder if it doens't exist yet? F.e. mails to projects+<projectname>@domain.ext will be moved to the folder <projectname>.

sean

HelenaGwyn yes, sort of.

Procmail's weird regex implementation includes an operator \/ that tells procmail to capture everything following the operator into a variable called $MATCH. You can then use $MATCH in the procmail action, for example as a destination folder name.

The catch is that there is no operator to tell it to stop capturing, so whatever appears after the \/ operator is going to end up in the $MATCH variable.

Here's the closest I was able to get to the behavior you described:

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* ^TO_projects\+\/.+@
.$MATCH/

In this example, everything after "projects+" up to and including "@" is matched. If you received a message sent to projects+foo@domain.ext then the message would be moved into a folder named "foo@" (which would be created automatically).

HelenaGwyn

I can't get it working.
I tried your suggestion.
I tried the example from the docs:

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* ^(to|cc|bcc):.*me@company\.com
.Work/

I also came across a solution with formail:

Who=`formail -zxTo: | cut -d@ -f1 | cut -d+ -f2`
:0:
.$Who/

Every time the mail doesn't arrive in the mailbox at all.

sean

HelenaGwyn my example above uses the procmail-specific TO_ entity to match all recipient headers (ie to, cc, and bcc). Please try following that example, eg:

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* ^TO_*me@company\.com
.Work/

That rule should put anything sent to me@company.com into your Work folder. If it does not then please email our support team to let us know the mailbox name and we'll look into it further.