Some errors are caused by lack of global resources, and sometimes that lack goes away. For example, if some big batch job is currently eating most of the RAM, that batch job will finish and the RAM will become available for the IMAP server. (The sysadmin may need to add more RAM in the long term, though.)
Why should the client be required to handle a server running out of RAM?
-- Mark --
http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.
