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I have setup postfix to use virtual users for inbound emails, with the configuration read from mysql.

However, when I try to deliver a mail locally, using something like sendmail root@localhost < testmail, the queries are being executed, but the mail is not delivered to the virtual user directory.
The directory /var/mail/root is created instead.

Mysql config seems correct, as the following queries are executed:

SELECT destination FROM aliases WHERE mail='root@localhost' and enabled = 1

+----------------+
| destination    |
+----------------+
| root@localhost |
+----------------+

SELECT destination FROM aliases WHERE mail='localhost' and enabled = 1;
Empty set (0.00 sec)

SELECT domain FROM domains WHERE domain='localhost' and enabled = 1;

+-----------+
| domain    |
+-----------+
| localhost |
+-----------+

But they seem to be ignored.
When trying to login through courier IMAP, this results in the following:

1 login root@localhost <password>
* BYE [ALERT] Fatal error: No such file or directory: No such file or directory

because the folder that postfix created is not the one set in the DB for the user.

Config

(largely inspired from a guide):

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix

mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mynetworks_style = host
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +

# working relayhost config here

smtpd_recipient_restrictions = reject_unauth_pipelining, permit_mynetworks, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unauth_destination, permit
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_sender_restrictions = permit_mynetworks, warn_if_reject reject_non_fqdn_sender, reject_unknown_sender_domain, reject_unauth_pipelining, permit

virtual_alias_maps = mysql:/etc/postfix/mysql_alias.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/spool/mail/virtual
virtual_mailbox_domains = mysql:/etc/postfix/mysql_domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql_mailbox.cf
virtual_uid_maps = static:5000
  • What is the output (when run as root) of postconf ? – davidgo Mar 17 '14 at 23:23
  • @davidgo it's 900+ lines so can't paste it, but from a quick look it looks right. Any particularly interesting part? – Razor Mar 17 '14 at 23:29
  • I don't know what might be interesting, but it strikes me as rather difficult to try and troubleshoot a Postfix configuration without actually seeing the postfix configuration. Try providing a "postconf -n" which should hopefully be a lot smaller and leave out all the default config stuff. Of particular interest would be the virtual_* stuff and associated files. – davidgo Mar 17 '14 at 23:52
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In order to determinate if postfix is actually delivering to a virtual mailbox, you can check the relay value in /var/log/mail.log.
Try:

tail -100 /var/log/mail.log | grep relay=

You are most likely seeing relay=local, whereas you want relay=virtual.

This happens because postfix is delivering to local_recipient_maps.
One indication of this issue is that in your log you can see

warning: do not list domain example.com in BOTH mydestination and virtual_mailbox_domains

You can fix this issue by either overwriting mydestination with an empty value:

#/etc/postfix/main.cf
mydestination = 

or forcing postfix to use virtual transport even for local mailboxes:

#/etc/postfix/main.cf
local_transport = virtual
local_recipient_maps = $alias_maps $virtual_mailbox_maps

The first option is better because it solves the root problem, rather than hammering it in a quiet corner.

| improve this answer | |
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Shouldn't the IMAP server getting the mails directly instead of from the maildir? Or /var/mail/foo?

I use dovecot, and I've setup a lmtp forward socket on which dovecot listens. When new mail arrives, postfix sends it to dovecot socket. The directory etc is all managed by dovecot.

| improve this answer | |
  • I would like to make this work without any extra dependencies such as dovecot if possible. Shouldn't postfix be able to handle virtual directories natively? – Razor Mar 18 '14 at 9:00
  • Can you post the configuration and table data for virtual mailbox maps? I sniff some problem there. Or may be the priority is getting messed up, root@localhost is a valid user and postfix directly delivers instead of looking up the tables. – Nilesh Mar 18 '14 at 11:02

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