cur...@maurand.com a écrit : > Can I also assume that I would use relay_domains and relay_transport? > > Correct?
see the ADDRESS CLASS README. in short, domains/addresses come into many flaours: - if mail is to be delivered to unix accounts, then * list the domain in mydestination * list valid addresses in local_recipient_maps - if postfix should deliver locally to virtual mailboxes (same box, but not unix accounts). then * list the domain in virtual_mailbox_domains * list valid addresses in virtual_mailbox_maps - if mail should be forwarded to a remote server, then * list the domain in relay_domains * list valid addresses in relay_recipient_maps - if the domain is an alias (f...@alias.example goes to f...@target.example), then * list the domain in virtual_alias_domains * add address mappings in virtual_alias_maps. - anything else is a "foreign" mail that is rejected by reject_unauth_destination. and is otherwise forwared using transports (default-ing to MX/A lookup). with experience, you can play with all the above (for example, with transport_maps, you can change the destination...). but the above should give you an idea of what class is for what mail.
