@@ postconf -n

alias_database = hash:/etc/postfix/aliases
alias_maps = $alias_database hash:/var/lib/mailman/data/aliases
broken_sasl_auth_clients = yes
disable_vrfy_command = yes
fallback_transport = virtual
home_mailbox = .maildir/
local_recipient_maps = unix:passwd.byname $alias_maps $virtual_maps $virtual_mailbox_maps
mail_owner = postfix
mail_spool_directory = /var/spool/mail
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain
mydomain = cyt.hu
myhostname = mail.cyt.hu
mynetworks = 127.0.0.1/32
mynetworks_style = host
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
queue_directory = /mnt/data/mail
recipient_delimiter = +
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
show_user_unknown_table_name = no
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_client_restrictions =
smtpd_helo_required = yes
smtpd_helo_restrictions =
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination,        reject_invalid_hostname,        reject_non_fqdn_hostname,        reject_non_fqdn_sender,        reject_non_fqdn_recipient,        reject_unknown_sender_domain,        reject_unknown_recipient_domain,        reject_unauth_pipelining, permit
transport_maps = pcre:/etc/postfix/transport
unknown_local_recipient_reject_code = 450
virtual_gid_maps = static:207
virtual_mailbox_base = /var/spool/postfix/virtual
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 207
virtual_overquota_bounce = yes
virtual_uid_maps = static:207


@@ /etc/postfix/transport

/autoreply/     vacation:


@@ /etc/postfix/virtual.pcre

/^([^@]+)@((?!autoreply)[^@]+)$/       $1@$2, $1@autoreply.$2


@@ /var/lib/mailman/data/aliases

teszt2:             "|/usr/lib64/mailman/mail/mailman post teszt2"
...


@@ /var/lib/mailman/data/virtual-mailman

teszt2@cyt.hu              teszt2



@@ and the log from the problem
...
Feb 19 13:16:27 thor postfix/cleanup[15667]: maps_find: virtual_alias_maps: hash:/var/lib/mailman/data/virtual-mailman(0,lock|fold_fix): teszt2@cyt.hu = teszt2
Feb 19 13:16:27 thor postfix/cleanup[15667]: mail_addr_find: teszt2@cyt.hu -> teszt2
...
Feb 19 13:16:27 thor postfix/cleanup[15667]: rewrite_clnt: local: teszt2 -> teszt2@cyt.hu
...
Feb 19 13:16:27 thor postfix/qmgr[15662]: resolve_clnt: `root@cyt.hu' -> `teszt2@cyt.hu' -> transp=`virtual' host=`cyt.hu' rcpt=`teszt2@cyt.hu' flags= class=virtual
...
Feb 19 13:16:27 thor postfix/virtual[15671]: E819FE2FF44: to=<teszt2@cyt.hu>, relay=virtual, delay=0.07, delays=0.05/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "teszt2@cyt.hu")