[Dovecot] Incoming mails + remote backup

[minim]

Steffen Kaiser-9 wrote:
> 
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> On Tue, 6 Apr 2010, minim wrote:
> 
>>>> mails? except configuring forwarder to each mail ID !!!!
> 
>> Is it possible to configure MTA to deliver to remote servers?
> 
> sendmail can deliver to TCP or Unix socket or via a program.
> But sendmail cannot deliver the same message twice, once the delivery 
> takes place. As you do not want to add a forward or alias for each 
> account, which probably can be created automatically, you could add a 
> wrapper around your LDA/MDA, that copies the cloned message to yet another 
> system, e.g.:
> 
> normal:
> 
> /etc/mail/smrsh/dovecot-deliver -f $g -d $u
> 
> Wrapper:
> 
> /etc/mail/smrsh/wrapper --mode sendmail -f $g -d $u -m $h
> 
> ===
> #!/bin/bash
> 
> tmpf=/tmp/wrap.$$.tmp
> trap 'rc=$?; rm -f '$tmpf' 2> /dev/null;exit $rc' EXIT
> 
> cat - > $tmpf || exit
> /etc/mail/smrsh/dovecot-deliver "$@" < $tmpf || exit
> #ssh otherserver /etc/mail/smrsh/dovecot-deliver "$@" < $tmpf
> exit 0
> ===
> 
> The #ssh line is to forward the message.
> 
> you could code a LMTP proxy, sendmail then talks LMTP to the LDA, which 
> splits its input, in order to forward the commands to another LMTP server 
> and calls Dovecot's deliver locally.
> 
> BTW: rsync works (see mailing list) reasonably well.
> 
> Regards,
> 
> - -- 
> Steffen Kaiser
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> 

Thanks for responding   :)
Where and how should I use the below wrappers?
/etc/mail/smrsh/wrapper --mode sendmail -f $g -d $u -m $h 

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