Disable spamassassin and amavis for a single domain

==== Required information ====
- iRedMail version: 0.8.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  LDAP
- Linux/BSD distribution name and version: OpenSuse12.3
- Related log if you're reporting an issue:
====

Hi Zhang,

I can disable antivirus and antispam for a domain where for example my SMTP server work as backup?

Thanks.

Marco.