Opening all mailboxes upon exec'ing mutt ?

["Wilkinson, Alex" <alex.wilkinson@xxxxxxxxxxxxxxxxxxx>]

Hi all,

Currently when I exec() mutt I am prompted for my password for an IMAP
server. This is desired behavior. However, if I want to change into any of
my defined mailboxes I got prompted *again* for my password. 

Question: Is it possible to enter my password once and only once and get
          access to all of my mailboxes ?

Thanks

 - aW