source is a debian build, share is a readynas.   i've been getting
rsync: mkstemp 'filename goes here' failed: Not a directory (20)
errors. rsync is v3.0. i believe this is related to the dovecot file
naming convention that includes characters such as ':' in the
filename. anyone else seeing similar behavior? a workaround? i can go to different backup strategies, but rsync is cheap and effective for
my needs.  thanks,

The problem I encountered with cifs is that could not be compatible with unix
permissions and sometimes also fails setting directory date/time

When I backup on cifs either I use rsync and disable those features or I
tar-gzip each mailbox and copy it.

thanks for the feedback. i see the same problems w/ cifs. scripting this is turning out to be slightly more subtle than i thought. various combinations of rsync --delete, rsync --dry-run, tar, etc. _may_ be viable. unfortunately it looks like cifs also barks at some of the unix tar permissions, so i may turn the whole process around and run it from the rsync server on the NAS, though that also has issues.

-SM-

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