[MlMt] Assigning coloured flags with rule

[Matthew Cawood]

In Apple Mail, I found it useful to flag anything that came via a 
mailing list with a yellow flag.

In MailMate, pulling out emails from mailing lists is infinitely easier 
than in Apple Mail, but I can't figure out how to apply a yellow flag to 
everything that lands in the smart folder. Using a rule to apply one of 
the <$MailFlagBit> options doesn't seem to work.

Yellow flags exist - they came across from Apple Mail, and I see from an 
earlier thread that they can be applied with the keyboard - but how do I 
get MailMate to apply them automatically?

(One weakness of MailMate is the lack of options for visually marking 
emails. Beyond the standard red flag, there isn't much that's ready to 
hand.)

Matt