CC in email filters

[override]

Hi,
Is it possible to customize email filters? I want to put mails in specific folder when CC field is matching criteria.
Tried something with espocrm/application/Espo/Resources/metadata/entityDefs/EmailFilter.json and espocrm/application/Espo/Resources/layouts/EmailFilter/detail.json but it seems it's not enough?

Thanks

[override]

Hi,
I was able to make cc work, but it doesn't work when espo users are sending emails. If email exists in espo filter doesn't work.
Anything to check?

Thanks