im not so certain with those two operations, i'm new working with Iredmail and linux.

1.
file: /etc/postfix/mysql_virtual_alias_maps.cf <<<<--- i cannot find the file on this location, but on this path /etc/postfix/mysql/virtual_alias_maps.cf

contents of file:

user           = vmail
password    = (password deleted)
hosts          = 127.0.0.1
port            = 3306
dbname       = vmail
query           = SELECT alias.goto FROM alias,domain WHERE alias.address='%s' AND alias.domain='%d' AND alias.domain=domain.domain AND alias.active=1 AND domain.backupmx=0 AND domain.active=1

Should i right away replace the query line, of the text that is written on the wiki page?
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2.
$ mysql -uroot -p
mysql> USE vmail;
mysql> INSERT INTO alias (address, goto, domain) VALUES ('@domain.ltd', 'dest@example.com', 'domain.ltd');

should it be like this?

$ mysql -uroot -p
mysql> USE vmail;
mysql> INSERT INTO alias (address, goto, domain) VALUES ('@myhotel.com', 'bobarchive@myhotel.com', 'myhotel.com');

to sum up, all i need to do is do this?

$ mysql -uroot -p
mysql> USE vmail;
mysql> INSERT INTO alias (address, goto, domain) VALUES ('@myhotel.com', 'bobarchive@myhotel.com', 'myhotel.com');

to make bobarchive@myhotel.com catch ALL incoming and outgoing email from myhotel.com domain.....