opam could show a warning if it didn't have an updated signed timestamp for a certain amount of time (1 day, 7 days). We had a similar warning for ClamAV when n

opam could show a warning if it didn't have an updated signed timestamp for a certain amount of time (1 day, 7 days). We had a similar warning for ClamAV when no anti-virus signature database updates were seen for a certain amount of time, usually indicating DNS problems or bad mirror selection.