Ok, so I had to ask (I have a number of admins who this bugs to no end)..
What causes the counts in the Mail Queues page to be Red (or black).. I can't find a rhyme or reason what prompts the color coding, as sometimes I have a 1 in red, and a 40 in black, in the same column, and other times, in reverse...
Anyone have any ideas? (Searching manuals/google/zimbra.com finds nothing about this.. or I missed it)