Sets up a declaratively configured OpenLDAP instance with users alice
and bob. They each own one email address,
First we test that postfix can communicate with LDAP and do the expected
lookups using the defined maps.
Then we use doveadm to make sure it can look up the two accounts.
Next we check the binding between account and mail address, by logging
in as alice and trying to send from bob@example.com, which alice is not
allowed to do. We expect postfix to reject the sender address here.
Finally we check mail delivery between alice and bob. Alice tries to
send a mail from alice@example.com to bob@example.com and bob then
checks whether it arrived in their mailbox.
Allow configuring lookups for users and their mail addresses from an
LDAP directory. The LDAP username will be used as an accountname as
opposed to the email address used as the `loginName` for declarative
accounts. Mailbox for LDAP users will be stored below
`/var/vmail/ldap/<account>`.
Configuring domains is out of scope, since domains require further
configuration within the NixOS mailserver construct to set up all
related services accordingly.
Aliases can already be configured using `mailserver.forwards` but could
be supported using LDAP at a later point.
Martin Weinelt
