Oh. I see. It's in the online doc chapter 11 String expansions.
"A couple of expansion conditions do not expand some of the
brace-delimited branches, for security reasons, and expansion of data
deriving from the sender (“tainted data”) is not permitted (including
acessing a file using a tainted name)."
So, using dovecot_lda delivery I have:
command = /usr/lib/dovecot/dovecot-lda -f $sender_address
Exim4 does not like this. [Debian packaging on Ubuntu.]
Am I reading in various places this i current issue when using 4.96 and
Dovecot?
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