Viktor Dukhovni:
> > On Feb 12, 2021, at 12:29 PM, Eugene Podshivalov <yauge...@gmail.com> wrote:
> >
> > Another somewhat related question is: in order to probe the smtpd needs to
> > resolve all virtual etc. mappings which is also done by the cleanup. Is
> > this resolution done twice in this case?
>
> The smtpd(8) process does not perform any *rewriting*, the unmodified
> "MAIL FROM" and "RCPT TO" addresses are passed to cleanup(8).
>
> However, smtpd(8) may perform a virtual(8) *lookup* in order to determine
> recipient address *existence*, as part of table-based recipient address
> validation (not to be confused with probe-based recipient address
> verification).
>
> - virtual_alias_maps for all non-default address classes
> - local_recipient_maps for addresses matching $mydestination
> - virtual_mailbox_maps for addresses matching $virtual_mailbox_domains
> - relay_recipient_maps for addresses matching $relay_domains
>
> These lookups check *existence* only. The RHS value is discarded.
Also: {recipient,}canonical_maps for all address classes.
Wietse
