We are building a service of which one part will be forwarding mail; so there will be lots of [email protected] "accounts" but these will only be forwarded - we will not have any actual mailboxes or store any mail on the server.
While I know most, if not all, mailservers can do this - does anyone have any recommendation for a mail server that is particularly well suited for this purpose? It would be fine if this is all the mail server does.