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Accepted
Jakob Lenfers
Asked: 2017-11-08 02:27:03 +0800 CST

Authenticate Postfix through Dovecot with slightly different settings

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I'm setting up a server with Dovecot (2.2.2) and Postfix (3.1.0). Dovecot authenticates against LDAP and Postfix uses Dovecots SASL. That already works fine. But I would like to have slightly different LDAP settings for Dovecot and Postfix. Current setup:

passdb {
  driver = ldap
  args = /etc/dovecot/dovecot-ldap.conf.ext
}
userdb {
  driver = ldap
  args = /etc/dovecot/dovecot-ldap.conf.ext
}

Excerpt from dovecot-ldap.conf.ext:

user_filter = (& \
    (objectClass=gosaMailAccount) \
    (allowedServices=*I*) \
    (uid=%u) \
)

I wanted to have sparate LDAP filters (allowedServices=*I* for Dovecot and allowedServices=*S* for Postfix), to be able to disable SMTP and IMAP independently. Does anybody know a way to separate those settings?

postfix

1 Answers

  1. Best Answer

    I got an answer on the Dovecot list. I used the %s (service variable) like this:

    user_filter = (& \
    (objectClass=gosaMailAccount) \
    (allowedServices=*%L1s*) \
    (uid=%u) \
)

    %L1s uses the first letter of the %s variable, which returns imap and smtp for the respective services.

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