Data retention
Messages received through the contact form or by email are retained for as long as necessary to handle the inquiry and, where relevant, to maintain the editorial record.
Correction reports and their resolutions may be retained longer, because a fixed article should stay fixed. Data that is no longer needed is deleted rather than archived indefinitely.
Practically: a routine question is cleared once the exchange is finished. A factual correction stays on file for as long as the corrected page stays published, so a future editor can see what was changed.