#1.5 dkim_domain = ${if eq{$sender_address_domain}{}{$primary_hostname}{$sender_address_domain}} dkim_selector = x dkim_private_key = ${if exists{/etc/virtual/$dkim_domain/dkim.private.key}{/etc/virtual/$dkim_domain/dkim.private.key}{0}} dkim_canon = relaxed dkim_strict = 0