If it’s not in an unblock bug, we probably aren’t reading it
We really, really prefer unblock bugs to anything else right now (at least, for things relating to Jessie). Mails on the list get lost, and IRC is dubious. This includes for pre-approvals.
It’s perfectly fine to open an unblock bug and then find it’s not needed, or the question is really about something else. We’d rather that than your mail get lost between the floorboards. Bugs are easy to track, have metadata so we can keep the status up to date in a standard way, and are publicised in all the right places. They make a great to-do list.
By all means twiddle with the subject line, for example appending “(pre-approval)” so it’s clearer – though watch out for twiddling too much, or you’ll confuse udd.
(to continue my theme: asking you to file a bug instead costs you one round-trip; don’t forget we’re doing it at scale)