postfix: how do I set virtual mailbox to create null client? [closed]

I have a simple mail server, using vhost/vmaps to create virtual mailboxes.

here is my current setting:

www logs # postfix | grep virtual
...
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = /etc/postfix/vhosts
virtual_mailbox_limit = 51200000
virtual_mailbox_lock = fcntl, dotlock
virtual_mailbox_maps = hash:/etc/postfix/vmaps

www logs # cd /etc/postfix
www postfix # ls
dynamicmaps.cf  post-install    recipient_bcc     vhosts
main.cf         postfix-files   recipient_bcc.db  vmaps
master.cf       postfix-script  sasl              vmaps.db
www postfix # cat vhosts
myserver.com
www postfix # cat vmaps
[email protected] myserver.com/admin/
[email protected] myserver.com/admin/
[email protected] myserver.com/admin/
[email protected] myserver.com/admin/
[email protected] myserver.com/admin/
[email protected] myserver.com/admin/

I want to create another mailbox, to [email protected], that every mail sent to this account gets thrown to /dev/null automatically.

How should I edit my main.cf/virtual domains/virtual maps?

I tried

[email protected] myserver.com/../../dev/null

but to no avail.

Try the following

Create local user

# useradd -s /sbin/nologin -d /dev/null no-reply
# passwd no-reply

Add the following line to the /etc/aliases

no-reply: /dev/null

Point [email protected] to the local user

virtual_alias_maps = hash:/etc/postfix/virtual_alias

/etc/postfix/virtual_alias

[email protected] no-reply

Create all necessary maps

# postmap /etc/postfix/virtual_alias
# postmap /etc/aliases

And don't forget restart the postfix