[Varyon]

From how I understand it, magic cannot directly affect meteoric iron, but indirect effects are perfectly fine. If you light a fire with magic, it will heat the iron just like one lit by other means. If you have someone with a magical ability to fly, carrying meteoric iron doesn't change this at all, they're simply carrying it as normal encumbrance - but if that same person had magical telekinesis, it wouldn't be able to move the iron on its own (although if the iron were attached to something, say a wooden haft for a meteoric iron axe, moving the attached object would move the meteoric iron just fine).

Meteoric iron isn't antimagic, it's just unaffected by magic. Note this also means a meteoric iron weapon will pass right through a magic force field, but if you're using magic to simply strengthen the armor you're already wearing (or your clothes, or your bare flesh), the strengthening effect is just as effective against the meteoric iron weapon as a weapon of terrestrial iron - the spell isn't affecting the weapon, it's affecting what the weapon is striking.