RELAY PROBLEM:
If I set mx=1 adress verification is switched off completely - I dont want this!
mx=0 verifies all adresses againt the "virtual mailbox table"
This is O.K. for local domains/users which are using roundcube as mailreader
This is not O.K. for relayed domains to another server because I dont want to maintain an extra relaymap. The standard postfix behavior is to verify against the given relay host for this domain (default_transport). Of course this setting can be overruled by a given address_verify_default_transport map. Unfortunately neither the first one nor the other ae functional with iRedmail.
My question is why?
If you mark a domain as backup mx (set mx=1), how do you verify all addresses? query 'virtual mailbox table' too?
I don't think Postfix will verify address against the given relay host for this domain, and it should be 'relay_transport', not 'default_transport'. relay_transport is set to 'relay' by default, it doesn't verify address.
I'm still not very clear what you want about this question/wishlist.
ARCHIVING PROBLEM:
It works with iRedmail!
Again: My question is how to set the "mail is archived" not just for the whole server, but for just a few domains or a single user.
This by the way is not a questionhow to do this, this is a feature request
See the subject: WHISLIST
Maybe you can try to define your own $policy_bank, then list certain domains/users as member of this $policy_bank.
I didn't try it before, you have to try it yourself, or ask in Amavisd mailing list.