alias (maps - virtual_alias_maps)

由 datahunter 在四, 03/05/2012 - 18:24 發表

最後更新: 2019-11-26

Local user 的 Catch All

luser_relay (default: empty)

luser_relay = sales

Optional catch-all destination for unknown local(8) recipients.

By default, mail for unknown recipients in domains that match $mydestination, $inet_interfaces or $proxy_interfaces is returned as undeliverable.

Note: if you use this feature for accounts not in the UNIX password file, then you must specify "local_recipient_maps =" (i.e. empty) in the main.cf file,

otherwise the Postfix SMTP server will reject mail for non-UNIX accounts with "User unknown in local recipient table".

virtual alias

virtual_alias_maps = proxy:mysql:/etc/postfix/mysql/virtual_alias_maps.cf

virtual_alias_maps.cf:

query  = SELECT alias.goto FROM alias,domain WHERE alias.address='%s' AND alias.domain='%d' AND alias.domain=domain.domain AND alias.active=1 AND domain.backupmx=0 AND domain.active=1

mysql-virtual_forwardings.cf

forwardings 都可以由它來完成

測試表是否有 result

postmap -q [email protected] hash:/etc/postfix/aliases

postmap -q [email protected] mysql:/etc/postfix/mysql/virtual_alias_maps.cf

Debug

# default: 2

debug_peer_level = 2

# 與合 debug_peer_level 使用

debug_peer_list = 127.0.0.1
debug_peer_list = e-mail.domain

Turn off Virtual aliasing

Virtual aliasing can be turned off selectively for mail received by smtpd(8), qmqpd(8), or pickup(8), by overriding main.cf settings in the master.cf file.

This feature is available in Postfix version 2.1 and later.

Example:

/etc/postfix/master.cf:

    127.0.0.1:10026    inet  n      -      n      -      -     smtpd
        -o receive_override_options=no_address_mappings

Note: do not specify whitespace around the "=" here.

At this point the message is ready to be stored into the Postfix incoming queue.

May  3 18:12:22 vm postfix/qmgr[16429]: 43E7E3D8073: from=<tim@?????>, size=1369, nrcpt=1 (queue active)
May  3 18:12:23 vm postfix/smtp[16449]: 43E7E3D8073: to=<tim@????>, orig_to=<info@????>, relay=mx.????.net[203.194.???.???]:25, delay=1.6, 
                                        delays=0.9/0.01/0.02/0.71, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 0151D3A021D)
May  3 18:12:23 vm postfix/qmgr[16429]: 43E7E3D8073: removed

Map 的次序

當第一個表沒有回應時, 那才會問第二個表, 其中一個有回應後, 之後的就不會再查 !

"X-Original-To" Header

dovecot unix    -       n       n       -       -      pipe
    flags=DRhuO user=[...OMIT OTHER SETTINGS HERE...]

Prepend an "X-Original-To: recipient" message header with the recipient address as given to Postfix.

(一定要這設定: dovecot_destination_recipient_limit = 1 及 enable_original_recipient = yes 才會加這 Header )

防止收到 "mail list" 出的信

假設系統有 maillist

services@mydomain a@mydomain, b@mydomain

那別人可以用以下 telnet cmd 入信

mail from: services@mydomain

rcpt to: services@mydomain

我比較簡陋的解決

main.cf

proxy_read_maps = ... $smtpd_recipient_restrictions

smtpd_recipient_restrictions =
 ...
 check_sender_access proxy:mysql:/etc/postfix/mysql/reject_maillist_sent_mail.cf,
 ...

reject_maillist_sent_mail.cf

user        = vmail
password    = ?????????????
hosts       = 127.0.0.1
port        = 3306
dbname      = vmail
# 由於 address!=goto 所以是 maillist 來
query       = SELECT 'reject maillist' FROM alias WHERE domain='%d' AND address='%s' AND address!=goto AND active=1

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