I have a new business partner who uses Barracuda Email Security Gateway.
The problem is that all our emails are quarantined as spam. The admin told me that our emails have "unsafety score" 3.7 out of 5.
We use SPF/DKIM in all our outgoing messages and our IP is not in any blacklist. Barracuda Central lookup page states that our IP does not have poor reputation and our domain is not not listed on Barracuda's Intent Block List. The categorization is wrong but I guess this has to do with URL filtering for the Web Gateway.
What is this unsafety score and what can I do with my emails in order to lower it?