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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 It's my understanding that as of 3.0 rsync supports OS X ACLs and extended attributes, and that it should be possible to backup a tree from an OS X system that contains files and folders with ACLs and extended attributes to a Linux host filesystem that has both "user_xattrs" and "acl" enabled on the destination file system.

...So, even while XMail runs as root, Dovecot need not and there is no problem getting it to work just like with other MTAs. XMail can't help with delivery to Maildir because it runs as root, and unless you mess about with packet filters to non-root it you'll still end up using for instance XACLs to allow Dovecot to read the mails. For authentication of XMail to Dovecot you would have to write external authentication helpers that use Dovecot's protocol. Or, you can use checkpassword or PAM-POP3 or something else to try getting Dovecot to authenticate against the active XMail list of u...