Two questions abount Anti-SPAM

Hi all,
1. How can I determine whether an email server uses Amavis and/or rspamd? Can it use both? Does it make sense?

2. Spam filter
The following approaches, among others, can be used to configure the spam filter:

• Spam filter -> Policy
• Email accounts -> Domain
• Email accounts -> Email mailbox
• Spam filter -> User / Domain

If a policy is entered in the domain (for domain.com) and the email mailbox ([email protected]) contains ‘- Inherit domain setting -’, this results in two entries under ‘Spam filter -> User / Domain’:

1. Priority 5 for ‘@domain.com’ with the policy selected for (domain.com)
2. Priority 7 for ‘- Inherit domain setting -’ for the email mailbox ([email protected])

My question: If the second entry is missing/deleted, is the spam filter for ([email protected]) deactivated?
Another one: Which priority is higher, 5 or 7 ?
On more: If both patterns do matching - are both policies applied in the sequence of the priority?

The question relates to the fact that these entries are not automatically created under ‘Relay domains’ and ‘Email relay recipient’ because the corresponding settings are not provided there.
Or do the spam filter policy and user/domain and greylisting settings generally not apply to ‘Relay domains’ at all?

Best regards
cmks

 

And one follow up:
What is the meaning of the option "Local: Yes/No" @ form "Spamfilter users" (Spam filter -> User / Domain) ?