Pipe to PHP script using Sieve Extprograms

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@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@localhost
}
protocol lmtp {
   mail_plugins = quota sieve
   postmaster_address = webmaster@localhost
}