The original commit:
198dca66a ARC signing instead of DKIM signing.
was unintended "reverted" in:
3288513eb [Config] Reasonable default settings for ARC
symbol_sign = "ARC_SIGNED";
# Whether to fallback to global config
try_fallback = true;
- # Domain to use for DKIM signing: can be "header", "envelope" or "recipient"
+ # Domain to use for ARC signing: can be "header", "envelope" or "recipient"
use_domain = "recipient";
# Whether to normalise domains to eSLD
use_esld = true;