Dear list,

We are finally back to our task of migrating from cyrus to dovecot. dovecot mostly does what we want in terms of POP3/IMAP server. Now we are preparing for migration. The plan is to use dovecot as proxy for not-yet migrated accounts. This works wonderfully for IMAP but not for LMTP. Here's what I find in the logs when I try to deliver e-mail to the dovecot lmtp port:

Jun 25 19:03:06 klee dovecot: lmtp(5037): Debug: none: root=, index=, indexpvt=, control=, inbox=, alt= Jun 25 19:03:06 klee dovecot: lmtp(5037): Connect from IP-address Jun 25 19:03:06 klee dovecot: lmtp(5037): Debug: user USER: Auth PASS lookup returned temporary failure: reason=Configured passdbs don't support crentials lookups Jun 25 19:03:06 klee dovecot: lmtp(5037): Debug: auth input: reason=Configured passdbs don't support crentials lookups

Delivery works fine without proxy (lmtp_proxy = no). What I would need to do is to configure the proxy part so that POP3/IMAP uses the accounts username/password and LMTP uses a special account to deliver e-mail.

This is dovecot-ldap.auth (the =proxy=y will be replaced by a field from ldap once the tests work):

uris = ldaps://our.ldap.server/ tls = no auth_bind = yes base = dc=mur,dc=at deref = never scope = subtree user_attrs = =home=/srv/vmail/mail/%Lu,=uid=999,=gid=999 user_filter = (&(objectClass=posixAccount)(uid=%u)) pass_attrs = uid=user,userPassword=password,=proxy=y,=host=our.imap.server,=starttls=yes iterate_attrs = uid=user iterate_filter = (objectClass=posixAccount)

dovecot -n

# 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 3.14-1-amd64 x86_64 Debian jessie/sid auth_verbose = yes disable_plaintext_auth = no lmtp_proxy = yes login_greeting = Dovecot is spitze! mail_debug = yes mail_location = maildir:/srv/vmail/mail/%u mail_plugins = acl namespace { hidden = no inbox = no list = children location = maildir:/srv/vmail/mail/%%u:INDEX=/srv/vmail/mail/%u/shared/%%u prefix = shared.%%u. separator = . subscriptions = yes type = shared } namespace inbox { hidden = no ignore_on_failure = no inbox = yes list = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = INBOX. separator = . subscriptions = yes type = private } passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile acl_shared_dict = file:/var/lib/dovecot/db/shared-mailboxes.db sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap lmtp pop3" service auth { unix_listener auth-userdb { group = vmail user = vmail } } service lmtp { inet_listener lmtp { address = 172.16.16.78 port = 24 } user = vmail } ssl_cert = </etc/dovecot/server.pem ssl_key = </etc/dovecot/private/server.pem userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } protocol lmtp { mail_plugins = acl quota sieve postmaster_address = postmaster@mur.at } protocol imap { mail_plugins = acl imap_acl }

Regards,

j.hofmüller

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