[Mailman-Users] Debugging user unknown

[Alexander]

G'day all,

I am trying to setup mailman on my linux server running postfix and 
virtual host integration. So far I have updated main.cf to include:

alias_database = hash:/etc/mail/aliases, hash:/var/lib/mailman/data/aliases
alias_maps = hash:/etc/mail/aliases, hash:/var/lib/mailman/data/aliases
virtual_alias_maps = hash:/var/lib/mailman/data/virtual-mailman, 
pgsql:/etc/postfix/pgsql_virtual_alias_maps.cf, 
hash:/var/lib/mailman/data/virtual-mailman

Ran genaliases to create /var/lib/mailman/data/aliases and 
/var/lib/mailman/data/virtual-mailman which seem to contain the correct 
settings

However emails to mailmain at domain and list-staff at domain are bounced with 
unknown user:

Feb 17 22:01:32 tinyturtle postfix/virtual[1404]: 5F4DE460402: 
to=<mailman at XXX.com>, relay=virtual, delay=0.12, delays=0.04/0/0/0.09, 
dsn=5.1.1, status=bounced (unknown user: "mailman at XXX.com")
Feb 17 22:06:18 tinyturtle postfix/virtual[1731]: 3D12D460402: 
to=<list-staff at XXX.com>, relay=virtual, delay=0.08, 
delays=0.03/0.01/0/0.04, dsn=5.1.1, status=bounced (unknown user: 
"list-staff at XXX.com")

Since postfix/virtual is doing the bouncing I am suspected that the 
mapping (virtual-mailman) was picked up, and that i cannot find the 
mapping in aliases, but I could be wrong here.

I have also run newaliases to ensure the local aliases are updated, but 
this did not resolve this issue.

Any pointers on what else to do, to help me debug my configuration.

Kind regards
Alex