Why not just try to print values of variables in your trackLastLogin.sh in a plain text file first? So that you can verify whether you have correct data.

Dovecot wiki site has detailed tutorial: http://wiki2.dovecot.org/PostLoginScripting

ok i've controlled the script and it's ok.

As wiki say i've modified the /etc/dovecot/conf.d/10-master.conf

service imap {
  # Most of the memory goes to mmap()ing files. You may need to increase this
  # limit if you have huge mailboxes.
  #vsz_limit = 256M
executable = imap imap-postlogin

  # Max. number of IMAP processes (connections)
  #process_limit = 1024
}

service pop3 {
  # Max. number of POP3 processes (connections)
  #process_limit = 1024
}

# The service name below doesn't actually matter.
service imap-postlogin {
  # all post-login scripts are executed via script-login binary
  executable = script-login /usr/local/bin/trackLastLogin.sh
  # the script process runs as the user specified here (v2.0.14+):
  #user = $default_internal_user
  # this UNIX socket listener must use the same name as given to imap executable
  unix_listener imap-postlogin {
  }
}

but i have no success.

the script work good.

May you help me?

Hello, if i put the lines in dovecot.conf, the service don't start.

If i put only the code below the service start but postlogin not start.

If i uncomment the line  #executable = imap imap-postlogin under protocol imap service don't start.

How i change the dovecot.conf to make it work?

Thanks in advance

service imap-postlogin {
  # all post-login scripts are executed via script-login binary
  executable = script-login /usr/local/bin/trackLastLogin.sh

  # the script process runs as the user specified here (v2.0.14+):
  #user = $default_internal_user
  #user = $default_internal_user
  # this UNIX socket listener must use the same name as given to imap executable
  unix_listener imap-postlogin {
  }
}
###### Fine Righe

protocol lda {
    # Reference: http://wiki2.dovecot.org/LDA
    mail_plugins = quota sieve autocreate
    auth_socket_path = /var/run/dovecot/auth-master
    log_path = /var/log/sieve.log
    lda_mailbox_autocreate = yes
    postmaster_address = root
}
protocol imap {
    imap_client_workarounds = tb-extra-mailbox-sep
    mail_plugins = quota imap_quota autocreate
    #executable = imap imap-postlogin
}

I see no error message, the service seem to start correctly, but the clients cannot receive and send mail.

finally i got it works, the problem was in the script because postgres use PGPASSFILE to use comman line not like MySql.

Now i get in database this record:

Last Login Date                          IP                              Protocol

2013-01-24 09:32:42.032582    192.168.4.83    /usr/lib/dovecot/script-login                                                                                                                                                                                                                                 
2013-01-24 09:32:40.979952    127.0.0.1    /usr/lib/dovecot/script-login                                                                                                                                                                                                                                 
2013-01-24 09:32:35.908215    192.168.17.46    /usr/lib/dovecot/script-login                                                                                                                                                                                                                                 
2013-01-24 09:32:33.941375    192.168.17.46    /usr/lib/dovecot/script-login                                                                                                                                                                                                                                 
2013-01-24 09:32:26.071862    192.168.4.151    /usr/lib/dovecot/script-login                                                                                                                                                                                                                                 
The protocol is not correct.
My script was:

#!/usr/bin/env bash

# $USER -> login username. It should be a valid email address.
# $IP   -> remote ip address (IPv4).
# ${1}  -> mail protocol: imap, pop3

VMAIL_DB_NAME='vmail'
#
if [ X"${USER}" != X"dump-capability" ]; then
sqlstring="UPDATE mailbox SET lastloginipv4='$IP',lastlogindate=NOW(),lastloginprotocol='${1}' WHERE username='$USER';"
su - postgres -c "psql -w vmail >/dev/null 2>&1 <<EOF
       UPDATE mailbox SET
       lastloginipv4='$IP',
       lastlogindate=NOW(),
       lastloginprotocol='${1}'
       WHERE username='$USER';
EOF"
fi

# Execute POP3/IMAP process.
if [ -f /etc/redhat-release ]; then
    # RHEL/CentOS.
    exec /usr/libexec/dovecot/${1} $*
elif [ -f /etc/debian_version ]; then
    # Debian & Ubuntu:
#    exec /usr/lib/dovecot/${1} $*
    exec ${1} $*
fi

I take off almost all comment, it's simplest to read.

How i can correct the protocol?

I want that it's POP or IMAP or WEBMAIL if it's possibile.