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On Fri, 19 Mar 2010, Frank Gadegast wrote:

Users should only be able to read archived email, they
should not be able to create folders or delete email.

As far as I know there is no global default ACL for folders.
E.g.: http://wiki.dovecot.org/ACL
plugin {
  # With global ACLs in /etc/dovecot/acls/ directory:
  acl = vfile:/etc/dovecot/acls
}

Then have a "*" or something in it.

===

But how about to prevent write access on Unix level? Can you mount the mail storage read-only? If necessary on a second mount point.

Regards,

- -- Steffen Kaiser
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