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On Mon, 24 Feb 2014, Charles Marcus wrote:
On 2/24/2014 3:58 AM, Steffen Kaiser <skdove...@smail.inf.fh-brs.de> wrote:
I would add a BCC recipient in the MTA. It's more save in such situation.
See the thread about qmail and multiple recipients for one mail address.
The only downside to this is all of the original headers are *not* preserved
in the BCC copy.
Er, I don't know what you mean with "all of the original headers". There
are no headers of the delivery process to user, that's right. Everything
else should be untouchted. Or in other words, the backup copy does not
"backup" the delivery process.
On 2/24/2014 3:58 AM, Steffen Kaiser <skdove...@smail.inf.fh-brs.de> wrote:
If posting (appending a new message) would be OK: Add a global Sieve script
and let each message: fileinto :copy "backup";
So... it looks like this would work as I described above? An identical copy,
preserving all of the original headers?
The other one would be the wrapper method. I just looked into the man page
of dovecot-lda:
-p path
Path to the mail to be delivered instead of reading from
stdin. If using maildir
the file is hard linked to the destination if possible. This
allows a single mail
to be delivered to multiple users using hard links, but
currently it also prevents
deliver from updating cache file so it shouldn't be used unless
really necessary.
So Dovecot LDA seems to keep its virtual fingers off the message and
you don't need to redirect all the time and you can get hard links,
if you use the same uid/gid for both users, 100% identical then e.g.:
#!/bin/bash
user=$...
f=/path/to/dir/on/same/mountpoint/as/user/and/user_backup/$$.tmp
cat - > $f
dovecot-lda .... -d ${user} -p $f
rc=$?
if test $rc -gt 0; then
rm -f $f
exit $rc
fi
dovecot-lda .... -d ${user}_backup -p $f
rm -f $f
# ignore errors to prevent re-delivery to user
exit 0
- --
Steffen Kaiser
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