Postfix can be configured to deliver mail directly to
maildrop,
without using the
local(8) delivery agent as an intermediate. This
means that you do not get local
aliases(5) expansion or $HOME/.forward
file processing. You would typically do this for
hosted domains with
recipients that don't have UNIX home directories.
The following example shows how to use maildrop for some.domain
and for someother.domain.
1 /etc/postfix/
main.cf:
2 maildrop_destination_recipient_limit = 1
3
virtual_mailbox_domains = some.domain someother.domain
4
virtual_transport = maildrop
5
virtual_mailbox_maps = hash:/etc/postfix/virtual_mailbox
6
virtual_alias_maps = hash:/etc/postfix/virtual_alias
7
8 /etc/postfix/virtual_mailbox:
9 [email protected] ...text here does not matter...
10 [email protected] ...text here does not matter...
11 [email protected] ...text here does not matter...
12
13 /etc/postfix/virtual_alias:
14 [email protected] postmaster
15 [email protected] postmaster
-
Line 2 is needed so that Postfix will provide one recipient
at a time to the maildrop delivery agent.
-
Line 3 informs Postfix that some.domain and someother.domain
are so-called
virtual mailbox domains.
Instead of listing the names in
main.cf you can also
list them in a file; see the
virtual_mailbox_domains documentation for
details.
-
Line 4 specifies that mail for some.domain and someother.domain
should be delivered by the maildrop delivery agent.
-
Lines 5 and 8-11 specify what recipients the Postfix SMTP
server should receive mail for. This prevents the mail queue from
becoming clogged with undeliverable messages. Specify an empty
value ("
virtual_mailbox_maps =") to disable this feature.
-
Lines 6 and 13-15 redirect mail for postmaster to the
local postmaster.
RFC 821 requires that every domain has a postmaster
address.
The vmail userid as used below is the user that maildrop should
run as. This would be the owner of the virtual mailboxes if they
all have the same owner. If maildrop is suid (see maildrop
documentation), then maildrop will change to the appropriate owner
to deliver the mail.
Note: Do not use the postfix user as the maildrop user.
/etc/postfix/
master.cf:
maildrop unix - n n - - pipe
flags=ODRhu user=vmail argv=/path/to/maildrop -d ${recipient}
The
pipe(8) manual page gives a detailed description of the
above command line arguments, and more.
If you want to support user+extension@domain style addresses,
use the following instead:
/etc/postfix/
master.cf:
maildrop unix - n n - - pipe
flags=ODRhu user=vmail argv=/path/to/maildrop
-d ${user}@${nexthop} ${extension} ${recipient} ${user} ${nexthop}
The mail is delivered to ${user}@${nexthop} (match key for
maildrop userdb lookup). The ${extension} and the other address
components are available to maildrop rules as $1, $2, $3, ... and
can be omitted from
master.cf or ignored by maildrop when not
needed.
