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Topic: Sender address rejected: User unknown in virtual mailbox table

==== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Linux/BSD distribution name and version: Ubuntu 13.10
- Related log if you're reporting an issue:
====

:/etc/postfix/mysql# for cf in $(ls *.cf); do echo ${cf}; postmap -q XX@XXXX.galileo.org mysql:./${cf}; done
catchall_maps.cf
domain_alias_catchall_maps.cf
domain_alias_maps.cf
recipient_bcc_maps_domain.cf
recipient_bcc_maps_user.cf
relay_domains.cf
sender_bcc_maps_domain.cf
sender_bcc_maps_user.cf
sender_login_maps.cf
transport_maps_domain.cf
transport_maps_user.cf
virtual_alias_maps.cf
virtual_mailbox_domains.cf
virtual_mailbox_maps.cf