Re: setting acl on autocreate folders

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Hi Ellie,

Chen's question made me recheck the docs and now I have a doubt. Could you please clarify under what user the LMTP-delivered mails enters Cyrus when "-a" option is used over TCP with lmtpd (i.e. lmtp cmd="lmtpd -a" listen="127.0.0.1:2004")?

The documentation (https://cyrusimap.org/imap/concepts/overview_and_concepts.html#local-mail-transfer-protocol-lmtp) says:

For final delivery via LMTP over a TCP socket, it is necessary to use LMTP AUTH. This is accomplished using SASL to authenticate the delivering user. If your mail server is performing delivery via LMTP AUTH (that is, using a SASL mechanism), you will want their authentication id to be an LMTP admins (either via the admins imapd.conf option or via the <service>_admins option, typically lmtp_admins).

Alternatively you may deliver via LMTP to a unix domain socket, and the connection will be preauthenticated as an administrative user (and access control is accomplished by controlling access to the socket).

But it doesn't say anything about the "-a: Preauthorize connections initiated on an internet socket, instead of requiring LMTP AUTH." (https://www.cyrusimap.org/imap/reference/manpages/systemcommands/lmtpd.html#cmdoption-lmtpd-a).

Thanks,
Anatoli

From: Ellie Timoney
Sent: Friday, May 11, 2018 00:46
To: Info-cyrus
Subject: Re: setting acl on autocreate folders

Hi Chen,

So, the question : is it possible to set specific ACLs on autocreated 
folders ? (i.e., ACLs, different from those defined by defaultacl in 
imapd.conf).
I believe the autocreate mechanism has no particular knowledge of ACLs all all. It just uses the standard Cyrus policy for assigning them, with no way to override it.

Cheers,

ellie

On Wed, May 9, 2018, at 6:37 PM, Chentao Credungtao via Info-cyrus wrote:
Hello,

This question has been asked twice before by different users, but no 
answer has ever be given.

In 2012 : https://www.spinics.net/lists/info-cyrus/msg14612.html

In 2016 : https://www.spinics.net/lists/info-cyrus/msg17385.html

I guess the answer is NO, but just the same I thought i'd asked again to 
be sure.

So, the question : is it possible to set specific ACLs on autocreated 
folders ? (i.e., ACLs, different from those defined by defaultacl in 
imapd.conf).

Thanks,

Chen

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