This post is used to fix incorrect postfix setting which cause mail forwarding (alias) and bcc invalid. If it doesn't work for you, please post a new topic in iRedMail General Technical Support forum.

First of all, we'd like to thank neliasen for his report and testing.

Abstract:

- Mail forwarding (virtual alias) and sender/recipient bcc are invalid.

Affected versions:

- iRedMail-0.5.0
- iRedOS-0.5.0

Steps to fix it:

- Backup your postfix configure files first.

# cp /etc/postfix/{main,master}.cf /opt/

- Remove 'receive_override_options=no_address_mappings' in postfix.

# postconf -e receive_override_options=''

- Add 'no_address_mappings' in postfix: /etc/postfix/master.cf

127.0.0.1:10025 inet n  -   -   -   -  smtpd
    -o content_filter=
    # ... SKIP OTHER LINES HERE ...
    -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_address_mappings

- Restart postfix to make new settings work:

# /etc/init.d/postfix restart

That's all. Enjoy