[LUGOS] postfix -- relay???

[Dalibor]

Na enem od podjetij imam postavljen mail server kjer kot MTA služi 
postfix. Na večini siteov sem preveril ali  ta strežnik relaya maile in 
jih ne (vsaj sodeč po testih). Eden od tipov v tem podjetju pa je od 
doma poslal mail preko tega smtp. Kako je to sploh možno?

Še main.cf

command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
program_directory = /usr/lib/postfix
smtpd_banner = $myhostname ESMTP
setgid_group = postdrop
biff = no
append_dot_mydomain = no
myhostname = mail.$mydomain
mydomain = XXXX.si
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = $myhostname
mydestination = XXXX.si, mail.XXXX.si, XX.si, mail.XX.si
relayhost =
mynetworks = 127.0.0.0/8, 192.168.0.0/16
mailbox_command =
mailbox_size_limit = 0
message_size_limit = 0
recipient_delimiter = +
smtpd_recipient_restrictions = permit_mynetworks, check_recipient_access 
hash:/etc/postfix/valid_emails, reject_unknown_recipient_domain, 
reject_non_fqdn_recipient, reject
smtpd_sender_restrictions = regexp:/etc/postfix/sender_restrictions
maps_rbl_domains = relays.ordb.org
smtpd_client_restrictions = reject_maps_rbl
transport_maps = hash:/etc/postfix/transport
soft_bounce = no
content_filter = smtp-amavis:[127.0.0.1]:10024