Am 2015-04-05 um 19:12 schrieb Ramón Casares:
Now I am looking for an IMAP server that can serve this collection in a read-only (ro) manner. That is, the server should not write the mailarch dir at all.
Dovecot ACL might be what you want? http://wiki2.dovecot.org/ACL Probably still writes indices… -- peter