Mailbox has a hinged front gate with a casing receiving a flag with lateral play for movement into raised and lowered positions to indicate "no mail" and "mail delivery", respectively. Provided on the flag and box are two ferromagnetic strips, respectively, of which at least one is a permanent magnet, with these strips being coordinated to be in the raised flag position in magnetic engagement for supporting the flag, and the strip on the flag will on opening of the gate turn with the latter and thereby disengage from the strip on the box for release of the flag for its gravitational drop to its lowered position.
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