[MlMt] Sort by time/date received rather than 'Date:' header field?

[Randall Gellens]

My server uses graylisting, so messages are sometimes delayed for 
anywhere from a few minutes to multiple hours (depending on the sending 
server's behavior).  MailMate seems to always sort by the 'Date:' header 
field.  As a result, I often notice that a message has appeared above 
the messages I think I'm aware of.  I find this annoying.  Is there a 
way to have a mailbox view show messages in the order they arrived?

--Randall