Email quarantined with low score

[Damian]

> The default amavisd.conf configuration contains a 
> @blacklist_sender_maps configuration that matches some special senders 
> such as “optin at something” and directly blocks the email regardless of 
> score.
>
Good catch with optin. It seems to be [1]: 2.9 + 5.0 > 6.31 
($sa_kill_level_deflt).

[1] 
https://gitlab.com/amavis/amavis/-/blob/v2.13.1/conf/amavisd.conf?ref_type=tags#L282