==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: FreeBSD 10.0
- Related log if you're reporting an issue:
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wich value can take the variable amavisForwardMethod to work with postfix into an iRedMail installation ?