> 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.
--
Viktor.
