A user's stored messages may be deleted with the delete
-messages command. When the -return switch is also
specified, any unread messages are returned as unread to their sender.
For instance, to delete the messages for the account jdoe,
returning any unread messages, use the command
popstore> delete -messages -return jdoe
Note that the -return switch may also be used with the
delete command as described in Section 6.5 .
6.9 Account quotas
Account quotas are used to control how much mail a user may store. Each
account has a primary quota and an overdraft quota which are
established when the account is created and may be changed with the
modify command. An account may not receive a new message
if either the account's present storage exceeds the account's quota, or
storage of the message would cause the account to exceed the sum of its
quota and overdraft quota.¹
Quotas are set and changed with the -quota and
-overdraft switches of the add,
copy, and modify commands. An account can be
granted unlimited quota with the -noquota switch. By
default, quotas are expressed in units of kbytes (1024 bytes).
Alternate units may be selected with the set storage_units
command.