dovecot - Mar 2019 - LMTP: Undelivered Mail Returned to Sender: User doesn't exist! :-(

:-)

I'm using postfix for mail delivery and dovecot for mailbox access imaps 
pop3s.

Postfix resolves, verifies and overwrites users' addresses by numerous 
subtle LDAP queries. However users are visible as local ones (openldap, 
pam, nss) in the sense I can run `id' or `finger' queries and receive 
replies.

Dovecot handles all mailboxes over imap/pop correctly with no additional 
configuration for LDAP. Just (10-mail.conf):
	
mail_location = maildir:/mailboxes/%u

and it works fine.

Because I'd like to use pigeonhole I'm trying to make local delivery via
dovecot LMTP (https://wiki2.dovecot.org/HowTo/PostfixDovecotLMTP). I've 
configured the socket and added to `/etc/postfix/main.cf' the line:

mailbox_transport = lmtp:unix:/var/spool/postfix/private/dovecot-lmtp

I think that id dovecot handles mailboxes correctly over imap/pop it can 
easily find the users and their mailboxes so it doesn't need any 
additional configuration for LDAP. Unfortunately it doesn't work and 
results in:

Undelivered Mail Returned to Sender: User doesn't exist! :-(

What's the thing I've missed?

Best regards,
Marek

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> On 17 March 2019 13:14 Marek Kozlowski via dovecot <dovecot at
dovecot.org> wrote:
> 
>  
> :-)
> 
> I'm using postfix for mail delivery and dovecot for mailbox access
imaps
> pop3s.
> 
> Postfix resolves, verifies and overwrites users' addresses by numerous 
> subtle LDAP queries. However users are visible as local ones (openldap, 
> pam, nss) in the sense I can run `id' or `finger' queries and
receive
> replies.
> 
> Dovecot handles all mailboxes over imap/pop correctly with no additional 
> configuration for LDAP. Just (10-mail.conf):
> 	
> mail_location = maildir:/mailboxes/%u
> 
> and it works fine.
> 
> Because I'd like to use pigeonhole I'm trying to make local
delivery via
> dovecot LMTP (https://wiki2.dovecot.org/HowTo/PostfixDovecotLMTP). I've
> configured the socket and added to `/etc/postfix/main.cf' the line:
> 
> mailbox_transport = lmtp:unix:/var/spool/postfix/private/dovecot-lmtp
> 
> I think that id dovecot handles mailboxes correctly over imap/pop it can 
> easily find the users and their mailboxes so it doesn't need any 
> additional configuration for LDAP. Unfortunately it doesn't work and 
> results in:
> 
> Undelivered Mail Returned to Sender: User doesn't exist! :-(
> 
> What's the thing I've missed?
> 
> Best regards,
> Marek
If your usernames do not have a domain, you need to configure auth to lookup
users by local part only.

Depending a bit on situation, sometimes it's better to do

auth_username_format = %Ln

sometimes it's better to configure the passdb itself.

Aki

:-)
>> I think that id dovecot handles mailboxes correctly over imap/pop it
can
>> easily find the users and their mailboxes so it doesn't need any
>> additional configuration for LDAP. Unfortunately it doesn't work
and
>> results in:
>>
>> Undelivered Mail Returned to Sender: User doesn't exist! :-(
>>
>> What's the thing I've missed?
> 
> If your usernames do not have a domain, you need to configure auth to
lookup users by local part only.
> 
> Depending a bit on situation, sometimes it's better to do
> 
> auth_username_format = %Ln
Exactly, that's the thing I missed (removing a domain suffix). Now it 
works fine, thank you.

Best regards,
Marek

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