[Postfix espanol] EHLO 502 Error: command not implemented

[mr_spock]

Disculpen por la pregunta tan simple, pero cuando hago telnet a mi servidor y pongo
EHLO <nombre-de-mi host>

me sale este mensaje
502 Error: command not implemented

nota: estoy siguiendo las instrucciones del howto de Patrick Koetter
para instalar postfix con soporte para SASL

como puedo arreglarlo  que me falta poner ?
He aquí mi configuracion actual:

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
inet_interfaces = all
mail_owner = postfix
mail_spool_directory = /var/spool/mail
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, $mydomain, 
mydomain =midominio.com
myhostname = host.midominio.com
mynetworks = 222.222.222.222/24, 192.168.1.0/28, 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /etc/postfix/readme
sample_directory = /etc/postfix/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,  permit_mynetworks, check_relay_domains
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
transport_maps = hash:/etc/postfix/transport
virtual_mailbox_base = /var/spool/mail/
virtual_mailbox_maps = hash:/etc/postfix/vmailbox
virtual_maps = hash:/etc/postfix/virtual
virtual_minimum_uid = 100
virtual_uid_maps = static:5000

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