From iRedMail

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OpenLDAP backend special

Deliver emails to mail list members without enabledService=smtp

With default Postfix settings in iRedMail-0.7.4 and earlier versions, if a mail user is not allowed to use SMTP service to send out email (without enabledService=smtp), he/she cannot receive emails which delivered to the mail lists which he/she is belong to. Below steps fix this issue.

• Edit Postfix config file, main.cf, update virtual_alias_maps to replace sender_login_maps.cf by virtual_group_members_maps.cf:
  • On Linux and OpenBSD, it's /etc/postfix/main.cf.
  • On FreeBSD, it's /usr/local/etc/postfix/main.cf. And you should use /usr/local/etc/postfix/ldap/virtual_group_members_maps.cf in Postfix setting described below.

# OLD SETTING
#virtual_alias_maps = ..., proxy:ldap:/etc/postfix/ldap/sender_login_maps.cf, ...

# NEW SETTING
virtual_alias_maps = ..., proxy:ldap:/etc/postfix/ldap/virtual_group_members_maps.cf, ...

• Create new file virtual_group_members_maps.cf:
  • Copy sender_login_maps.cf to virtual_group_members_maps.cf.
  • Edit virtual_group_members_maps.cf, remove (enabledService=smtp) (with brackets, yes) and save it.

• Restarting Postfix service is required.