Pipe to PHP script using Sieve Extprograms

[Thomas]

Hello,

I seem to be having some issues trying to setup a pipe to PHP scripts 
using Sieve Extprograms. I am trying to allow each individual mailbox to 
setup its own PHP pipe rules (in other words, each user should be able 
to pipe incoming emails to a user defined PHP script).

I have the following lines in my main Sieve configuration file 
(/etc/dovecot/conf.d/90-sieve.conf):

    sieve_extensions = +vnd.dovecot.pipe
    sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute
    sieve_plugins = sieve_extprograms


I have configured a Sieve service that looks like this 
(/etc/dovecot/conf.d/90-sieve-extprograms.conf):

    service php {
       # Define the executed script as parameter to the sieve service
       executable = /var/run/dovecot/sieve-pipe/php.sh

       # Use some unprivileged user for executing the program
       user = dovenull

       # The unix socket located in the sieve_pipe_socket_dir (as
    defined in the
       # plugin {} section above)
       unix_listener sieve-pipe/php {
         # LDA/LMTP must have access
         user = vmail
         mode = 0600
       }
    }



Contents of /var/run/dovecot/sieve-pipe/php.sh:

    #!/usr/bin/php



Sieve script for one of my mailboxes:

    require ["fileinto", "regex", "date", "relational", "vacation"];
    require ["mailbox", "imap4flags", "vnd.dovecot.pipe"];

    # Move spam to spam folder
    if header :contains "X-Spam-Flag" "YES" {
       fileinto "Junk";
       # Stop here so that we do not reply on spams
       stop;
    }

    pipe :try "php /var/www/web2/piping.php support at example.com"

    keep;



This results however in the following error in my log file:

    main script: line 5: error: require command: unknown Sieve
    capability `vnd.dovecot.pipe'.
    main script: line 14: error: unknown command 'pipe' (only reported
    once at first occurence).
    main script: error: validation failed.


I am also not quite confident I have set this up correctly. Am I heading 
in the right direction for what I am trying to achieve?

Dovecot version: 2.2.10

dovecot -n:

    # 2.2.10: /etc/dovecot/dovecot.conf
    # OS: Linux 3.10.0-514.16.1.el7.x86_64 x86_64 CentOS Linux release
    7.3.1611 (Core)
    auth_mechanisms = plain login
    disable_plaintext_auth = no
    listen = *,[::]
    log_timestamp = "%Y-%m-%d %H:%M:%S "
    mail_plugins = " quota"
    mail_privileged_group = vmail
    managesieve_notify_capability = mailto
    managesieve_sieve_capability = fileinto reject envelope
    encoded-character vacation subaddress comparator-i;ascii-numeric
    relational regex imap4flags copy include variables body enotify
    environment mailbox date ihave
    passdb {
       args = /etc/dovecot-sql.conf
       driver = sql
    }
    plugin {
       quota = dict:user::file:/var/vmail/%d/%n/.quotausage
       sieve = /var/vmail/%d/%n/.sieve
    }
    protocols = imap pop3
    service auth {
       unix_listener /var/spool/postfix/private/auth {
         group = postfix
         mode = 0660
         user = postfix
       }
       unix_listener auth-userdb {
         group = vmail
         mode = 0600
         user = vmail
       }
       user = root
    }
    service imap-login {
       client_limit = 1000
       process_limit = 500
    }
    service lmtp {
       unix_listener /var/spool/postfix/private/dovecot-lmtp {
         group = postfix
         mode = 0600
         user = postfix
       }
    }
    ssl_cert = </etc/postfix/smtpd.cert
    ssl_key = </etc/postfix/smtpd.key
    ssl_protocols = !SSLv2 !SSLv3
    userdb {
       driver = prefetch
    }
    userdb {
       args = /etc/dovecot-sql.conf
       driver = sql
    }
    protocol imap {
       mail_plugins = quota imap_quota
    }
    protocol pop3 {
       mail_plugins = quota
       pop3_uidl_format = %08Xu%08Xv
    }
    protocol lda {
       mail_plugins = sieve quota
       postmaster_address = root at localhost
    }
    protocol lmtp {
       mail_plugins = quota sieve
       postmaster_address = webmaster at localhost
    }