SMG Out of Office Emails Getting Quarantine

Hello Guys , I am having a problem will appreciate if someone could help. The version of SMG is (Version 10.5.2-3)

The issue I am facing is that the out of office emails are getting quarantine. What I did to partially sove it was

1. Add a additional action "Bypass content filtering policy" into "Local Good Sender Domains".

2. Disable or modify that triggered policy to allow the blank sender message cam through

I have a CF policy set that that blocks emails with blank subjects. I did the following

I edit "Local Good Sender Domain", click "Add" under "Actions", choose "Bypass content filtering policy", expand the policy list, choose "Blank Sender", then click "Add Action" and "Save" the change. It for  the time being fixed the problem but then 

our users get a lot of unwanted emails. We are afraid of to do this practice.

We Only we want to allow Out office emails and we can't bypass blank sender police for all good sender domains.

Please provide support to allow only out of office emails. Thanks