Here yes, and Support have confirmed this is expected.
Thats doesn't preserve the header. From:, To: etc. are changed.
Good suggestion, thanks. I wonder if the Filter and Spam filters will work on JF tags? I'll try it.
2) If messages are quarantined but shouldn't be, move them to your inbox (already possible).
I do hope not. As an alternative to a safe offline client, it's security is false, since it doesn't protect against false negatives. And as an addition to a safe offline client, it's security is redundant. Against which there is the insecurity it inflicts by increasing cost of quarantine checking.
I wasn't referring to specifically (what DH defines as) spam, but rather to anything the config says is 'junk'.