Incorrect Filename for Amavisd-new Setup

[Kurt]

An incorrect filename is listed within https://help.ubuntu.com/lts/serverguide/mail-filtering.html

Within the Amavisd-new section, the manual asks the user to modify /etc/amavis/conf.d/21-debian_defaults. This filename does not exist. I'm not sure if the filename should be corrected to 20-debian_defaults or 21-ubuntu_defaults.

While both 20-debian_defaults and 21-ubuntu_defaults files have $final_spam_destiny, only the 20-debian_defaults file has $sa_tag_level_deflt, $sa_tag2_level_deflt, $sa_kill_level_deflt, and $sa_dsn_cutoff_level flags.

Please advise. Thank you!