/usr/share/spamassassin/sa-update.cron 2>&1 | tee -a /var/log/sa-update.log failing

Thanks for anyone's help in find the following problem:

On Ubuntu, the daily cron job is failing:

/usr/share/spamassassin/sa-update.cron 2>&1 | tee -a /var/log/sa-update.logfailing

Error message:

config: SpamAssassin failed to parse line, "us1.list-manage.com us2.list-manage.com us3.list-manage.com us4.list-manage.com us5.list-manage.com us6.list-manage.com us7.list-manage.com us8.list-manage.com us9.list-manage.com us10.list-manage.com us11.list-manage.com us12.list-manage.com us13.list-manage.com us14.list-manage.com us15.list-manage.com us16.list-manage.com us17.list-manage.com us18.list-manage.com us19.list-manage.com us20.list-manage.com us21.list-manage.com" is not valid for "util_rb_3tld", skipping: util_rb_3tld us1.list-manage.com us2.list-manage.com us3.list-manage.com us4.list-manage.com us5.list-manage.com us6.list-manage.com us7.list-manage.com us8.list-manage.com us9.list-manage.com us10.list-manage.com us11.list-manage.com us12.list-manage.com us13.list-manage.com us1
 4.list-manage.com us15.list-manage.com us16.list-manage.com us17.list-manage.com us18.list-manage.com us19.list-manage.com us20.list-manage.com us21.list-manage.com
channel: lint check of update failed, channel failed
05-Apr-2026 05:34:55: SpamAssassin: Update available, but download or extract failed

FWIW, AI recommended I run this command.

grep -r"us1.list-manage.com"  /etc/spamassassin /var/lib/spamassassin

The output of the command.

/var/lib/spamassassin/3.004006/updates_spamassassin_org/20_aux_tlds.cf:util_rb_3
tld us1.list-manage.com us2.list-manage.com us3.list-manage.com us4.list-manage.com us5.list-manage.com us6.list-manage.com us7.list-manage.com us8.list-manage.com us9.list-manage.com us10.list-manage.com us11.list-manage.com us12.list-manage.com us13.list-manage.com us14.list-manage.com us15.list-manage.com us16.list-manage.com us17.list-manage.com us18.list-manage.com us19.list-manage.com us20.list-manage.com us21.list-manage.com

Then AI said:

"That is very strange. The file |20_aux_tlds.cf| is an official part of 
the SpamAssassin "updates" channel. Seeing a malformed line in an 
official update suggests either a corrupted download or a temporary bug 
in the rule distribution for version |3.004006|."

I then decided to post the problem here, rather than following AI's 
further suggestions.  Thanks. - Mark