[Dovecot] Changing Quota downward for special Mailboxes? (2.1.6)

It seems there is no way to correct te quota limit downward for some mailboxes, like:

quota_rule9 = UCE-TMP:storage=-10%%

The idea is to not eat up the users storage with spam, so that spam stays in the queue (for some time) while real mail gets delivered.

There *is* a line

            } else if (*value != '-' && relative_rule) {

in quota.c, but nothing else handles it, starting with quota_rule_parse_percentage.

Yours Jost Krieger

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