Great question — answering as the UphillTech team:
Most mole sauces are not particularly perishable, and would be fine for several days at room temperature. If it has a high salt content, it could be fine for weeks. Further, in the Northern Hemisphere it's currently winter, so if you live on this side of the planet you don't really have to worry about the jar being exposed to high temperatures. Tips: Ship using a carrier who will reliably deliver in 3 days or less Make sure there is "headroom" in the jars, so that if the mole freezes it doesn't crack the jar Pad the jar with at least two layers of distinct padding, for example bubble wrap surrounded by crushed paper. If it's not winter where you are, then you'll want to line the box with...
Full answer by FuzzyChef: https://cooking.stackexchange.com/a/112721 (CC BY-SA 4.0).
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