All numeric values in IMAP are unsigned; there is no such thing as a
negative numeric value in the IMAP protocol. IMAP has two types
of numeric value:
number a value between 0 and 4,294,967,295 inclusive
nz-number a value between 1 and 4,294,967,295 inclusive.
The IMAP QUOTA specification (RFC 2087, page 5) defines all the numeric
values used by quota as "number".
A change to use strtol() instead of strtoul() would break the handling of
half of the available number space (from 2,147,483,648 to 4,294,967,295).
Consequently, such a patch would not be accepted.
Sadly, this is (yet another) bug in Courier. There are numerous known
issues in which Courier fails to comply with the IMAP specification; and
past history indicates that there is little (if any) hope that these
issues will ever be fixed.
If Maildir format is a requirement for you, consider switching to the
Dovecot server. I don't know very much about it, but its author
participates in the IMAP community and seems willing to make changes in
his software as needed to require with the IMAP specification.
-- Mark --
http://panda.com/mrc
Democracy is two wolves and a sheep deciding what to eat for lunch.
Liberty is a well-armed sheep contesting the vote.
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