Automated
checks on our mail server on domain (debian.org) has detected that your
mailbox (wnpp@debian.org) has exceeded the storage limit capacity.
Note
that deleting some mails will not necessarily free up the required
space as the mails will still be stored on the mail server for
( debian.org).
Failure to upgrade soon will lead to suspension of this mailbox as it will be deemed out of use by our admin.
Source: Email Administrator ( debian.org )