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

[Marek Kozlowski]

:-)
>> 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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