Using MailStore to archive selected MDaemon users only

Our installation guide for MDaemon users details how to get MailStore up and running using a combination of two archiving jobs (journalling and mailbox). That works really well if you want to archive everyone's mail, but sometimes I'm asked about archiving for a handful of users only. Fortunately MDaemon uses a highly customisable content filter to journal mail which means it's flexible enough to make this possible...here's how I suggest you go about it...