Hello,
In general, you’re welcome to ask about mirrors support here, but historically I’m the one who tends our centrally-managed mirrors.
A few mirrors, however, are not handled locally with rsync but are instead managed through a dedicated account. In the case of OpenMandriva, your local account got left behind when ibiblio stood up a new login host and began transferring extant accounts on request, planning to clean through attrition. One of our graduate students transferred the account so you should again be able to push-mirror to ibiblio.
While we’re on the topic of the OpenMandriva mirror: you’re our largest mirrored Linux distribution by size, and one of the fewest-requested via HTTP. Is ibiblio considered an active mirror? Are we being treated as a secondary archive? If not, any chance we could prune some of the less-important content?
Don