BackupPC using wrong host for sending mail

Sending a mail out from BackupPC fails (well, I’m assuming so, as nothing was received):

[root@ns8 data]# runagent -m backuppc1 podman exec backuppc-app su -s /bin/sh backuppc -c ‘/usr/local/BackupPC/bin/BackupPC_sendEmail -u eddie@bogolinux.net
Sending test email using /usr/sbin/sendmail -t -f backuppc
sendmail: /etc/msmtprc: line 7: invalid argument none for command auth
[root@ns8 data]#

/ $ cat /etc/msmtprc
### Automatically generated on container start. See documentation on how to set!
account default
host 10.5.4.1
port 25
domain %H
maildomain %H
auth none
tls off
tls_starttls off
tls_certcheck off
/ $

As well as the invalid argument error I’m not sure how the host address would be interpreted as that is the WireGuard interface for the Cluster:

[root@ns8 data]# cat /etc/wireguard/wg0.conf
[Interface]
Address = 10.5.4.1/32
ListenPort = 55820
PrivateKey =

Cheers.