I'm used, in exim on debian stretch (4.89-2+deb9u7) add something like:
DKIM_CANON = relaxed
DKIM_SELECTOR = 2020
DKIM_DOMAIN = ${lc:${domain:$h_from:}}
DKIM_PRIVATE_KEY = ${if
exists{/etc/exim4/dkim/DKIM_DOMAIN-DKIM_SELECTOR-private.pem}{/etc/exim4/dkim/DKIM_DOMAIN-DKIM_SELECTOR-private.pem}{0}}
to enable DKIM for selected 'from' addresses in my servers, using predefined
'.ifdef' in predefined debian transports.
I've done the same on buster (exim 4.92-8+deb10u4), but DKIM headers get not
added.
Why? Thanks.
--
Chiamare 'Sbruffoncella' una donna che vìola le leggi di un Paese ostile
solo per portare in salvo 42 naufraghi è come chiamare 'Onesto' un tizio
che ha rubato 49 milioni di euro. (Dek)
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