komodo writes:
HiI'm trying to setup courier with Deovecot LDA instead of maildrop. I need to use sieve filters.And i am not able to find some usefull informations about settings courier with dovecot on the internetEverything is working fine if i have dot-courier file in users home directory like this | /usr/bin/spamc -U /var/run/spamassassin/spamd.sock -e /usr/libexec/dovecot/deliver -f $SENDERNow i need to setup this globaly so i need to replace DEFAULTDELIVERY in courierd, and here is the problem.I need this "-f $SENDER" there, but i am not able to do this in courierd config file.
Of course you can do it.You just need to understand how the configuration file is read and used. And how quoting works.
You should use apostrophes to set the DEFAULTDELIVERY variable in courierd, so that it contains the verbatim variable reference. So that variable expansion occurs when the default delivery instructions take place.
And, oh, you better use double quotes to quote "$SENDER" itself. Otherwise, if someone were to send you an email with the sender address set to something like this:
MAIL FROM:<;rm -rf $HOME;@example.com>then you'll have lots of fun on your hands, if Courier doesn't reject such a sender address for syntax reason -- can't think of any reason why.
Anytime you want to put together some complicated rube-goldbergian contraption with your mail system, you must have it audited by someone with experience in information security and penetration testing.
Otherwise, it's only a matter of time before you get hacked.
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