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On Mon, 24 Feb 2014, Steffen Kaiser wrote:
On Sun, 23 Feb 2014, Francesco wrote:
i was reading the dovecot-lda documentation as i'm using LDA as a
delivery agent on my current mailserver configuration.
I was curious to know if there are some options for having a message to
be delivered to a "twin mailbox" upon delivery.
this twin mailbox would work as a backup archive for recovering emails
in case the user accidentally deletes them.
so if i have a user which is alice i would create a second mailbox named
backup_alice or whatever respecting a predictable schema and then every
mail delivered to alice would also be delivered to backup_alice.
do you know if this can be done? have any example?
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.
Just to emphaze my intention: Use the MTA's ability of aliases, forwards
or whatever it is called. In sendmail you could create ".forward" files
for each recipient, to forward a message to the user without further
forward/aliasing and to other user(s). Or one could use sendmail's alias
feature to split a message.
i was also planning to use shared folders + ACLS to have backup_alice
accessible as a read only mailbox directly from the alice imap account.
If posting (appending a new message) would be OK: Add a global Sieve
script and let each message: fileinto :copy "backup";
Otherwise, use a shell wrapper:
file stdin into temp file,
call Dovecot LDA with original recipient
exit with LDA's exit code on error
call Dovecot LDA with backup recipient
exit 0 # ignores error to prevent repetitive delivery to recipient
I've posted a shell wrapper a few days ago in above mentioned thread.
- --
Steffen Kaiser
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