NAME
makehosteddomains - Build a database of hosted domains
SYNOPSIS
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makehosteddomains |
DESCRIPTION
makehosteddomains rebuilds the contents of the /etc/courier/hosteddomains.dat database from the contents of /etc/courier/hosteddomains. This can be either a file or a directory. If it's a directory, the contents of all the files in this directory are simply concatenated. The makehosteddomains script must be run in order for any changes to /etc/courier/hosteddomains to take effect.
The function of /etc/courier/hosteddomains is very similar to the one of /etc/courier/locals. Both configuration files specify a list of domains that are considered to be local domains - domains whose mailboxes are stored locally.
The difference is that domains listed in /etc/courier/locals are removed from addresses before their mailbox is looked up. For example, if the domain "example.com" is listed in /etc/courier/locals, then the address <user [AT] example.com> is delivered to a local mailbox named "user". If this domain is listed, instead, in /etc/courier/hosteddomains, then the address <user [AT] example.com> is delivered to a local mailbox named "user [AT] example.com". Usually you would use /etc/courier/locals to specify domains that correspond to your local system accounts, that are looked up in your system's password database. The /etc/courier/hosteddomains file is usually used when you have database-based virtual domains, that are maintained via an LDAP or a MySQL server. The Courier mail server's LDAP and MySQL authentication modules will use the full E-mail address to query the LDAP or MySQL server for the location of the local mailbox that correspond to the E-mail address. The Courier mail server's authuserdb authentication module can also use full E-mail addresses.
Contents of
hosteddomains
The file /etc/courier/hosteddomains simply contains a list
of domains, one per line, for example:
domain.com
example.org
Each domain can optionally be followed by a single tab character, in order to specify an alias for a domain, for example:
domain.com
mail.domain.com<TAB>domain.com
example.com<TAB>domain.com
First, we list the domain "domain.com" as a hosted domain. Then, we also list the domain "mail.domain.com", which is an alias for domain.com. The Courier mail server will take any address of the form <address [AT] mail.com>, rewrite it as <address [AT] domain.com>, and attempt to deliver the mail to a local mailbox for that name. The third entry does the same for "example.com"; mail addressed to <address [AT] example.com> is delivered to the local mailbox <address [AT] domain.com>.
alias@hosteddomain
This is a special local mail delivery rule for
hosteddomain-listed domains. This rule allows the Courier
mail server accept mail to any address@hosteddomain, where
"hosteddomain" is a domain listed in the
hosteddomains file, but there is no corresponding account
for address@hosteddomain. To provide delivery instructions
for any non-existing address in a hosteddomain-listed
domain:
1) Create the local address alias@hosteddomain. For example, if the hosteddomains file contains "example.com", create the local account alias [AT] example.com. This should be a normal account, with its own home directory, userid and groupid.
2) Create $HOME/.courier-default file in this account, containing the delivery instructions. See the dot-courier(5) [1] manual page for available delivery instructions.
NOTE that alias [AT] example.com must be a real account, not a mail alias. If you want to forward alias [AT] example.com to another address, put forwarding instructions in the .courier-default file. However, alias [AT] example.com can be a clone of another account (with the same home directory, userid, and groupid).
“WILDCARD
DNS”
Wildcard DNS is supported for hosteddomains by placing a
single period character before the domain name. For example,
the hosted domain entry “.domain.com” will cause
the Courier mail server to accept mail for
“anything.domain.com”.
The Courier mail server will accept mail for <address [AT] any.com> and attempt to deliver it to the local mailbox <address [AT] any.com>, and if that fails then attempt to deliver the mail to the local mailbox <address@.thing.domain.com>, then finally <address@.domain.com>
Note
There is a period after the '@' character. If you want all
mail for “any.thing.domain.com” to be delivered
as though it were sent to “domain.com”, you
should define an alias for the domain, for
example:
domain.com
.domain.com<TAB>domain.com
SEE ALSO
esmtpd(8) [2] .
AUTHOR
Sam Varshavchik
Author
NOTES
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1. |
http://www.courier-mta.org/dot-courier.html
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2. |