> 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.