Order of DKIM signing and spam scanning

[Damian]

> I'm not aware of the sa_userconf_maps config option, and it's not 
> noted in the Amavisd doco at 
> https://www.ijs.si/software/amavisd/amavisd-new-docs.html... is there 
> a solid description somewhere of what it does and how? Google is 
> pretty slim on results for it too. I can see it looks like it's SQL 
> lookups, which is not likely where I want to head - but maybe I have 
> it wrong. 

There is an example at [1]. Your use case probably is something like

> $policy_bank{'ORIGINATING'} = {
>   # ...
>   sa_userconf_maps => [
>     {'.' => '/etc/mail/spamassassin/special_user_config'},
>   ],
> };

[1] https://gitlab.com/amavis/amavis/-/blob/master/RELEASE_NOTES#L4148