Equivalent of Exchange's "send as"

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
==== ==== Required information ====
- iRedMail version: 0.7.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: CentOS 6.3
====

Hi,

Is there a way to configure iRedMail to allow an account to send an email on behalf of another account?
Exchange has such a feature where you give the permission "Send As" to an account.

Thanks