Destination address for unknown recipients
luser_relay
This parameter specifies an optional destination address for unknown
recipients. By default, mail for unknown local recipients is bounced.
The following expansions are done:
- $user (recipient username),
- $shell (recipient shell),
- $home (recipient home directory),
- $recipient (full recipient address),
- $extension (recipient address extension),
- $domain (recipient domain),
- $local (entire recipient localpart),
- $recipient_delimiter.
Specify ${name?value} or ${name:value} to expand value only
when $name does (does not) exist.
Examples:
- $user@other.host
- $local@other.host
- admin+$local