question: dovecot lda running as special user (vmail) or normal user (marcel)?

[Steffen Kaiser]

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On Fri, 10 Oct 2014, marcel.cochem wrote:

> I'm new to dovecot and wanted to build my own mailserver using
> dovecot+postfix.
> I currently have a Problem with Permissions with my mailfolder.
> I could solve it easily if i set it with chmod to 777. but thats no real
> solution.
>
> While reading my log files i see a lot messages like:
> Oct 10 05:19:52 lda(owncloud): Error: user owncloud: Initialization failed:
> Initializing mail storage from mail_location setting failed:
> stat(/home/vmail/example.com/owncloud/mail) failed: Permission denied
> (euid=100(owncloud) egid=1004(owncloud) missing +x perm: /home/vmail, dir
> owned by 5000:5000 mode=0700)
> Oct 10 05:19:52 lda(owncloud): Fatal: Invalid user settings. Refer to
> server log for more information.
>
> So Currently two Users need to acces the mail-folder:
> 1. The user itself (here: owncloud)
> 2. The vmail user

> I want to use dovecot with virtual users. Now the question is: shouldn't
> the directory be accessed only by the vmail user? and not by the owncloud
> user?

postfix starts the LDA as owncloud user, looks like you set postfix up to 
use system users. Either make it use the vmail user or use LMTP.

>> userdb {
>>   args = uid=5000 gid=5000 home=/home/vmail/example.com/%n
>>   driver = static
>> }

Via IMAP/POP3 and LMTP all users will use these settings.

- -- 
Steffen Kaiser
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