So, advice please.
My IP household is currently not receiving any mail, because the mail carrier does not arrive. I do not have the No Bills Ever LTR, but they are not receiving bills (at least no notices of repossession, though!), which I can live with. However, this also means the heir is not receiving the last book of her museum collection (nor any of the subsequent books). Metals sent to smelt aren't arriving either.
The newspaper kid also isn't arriving.
Last time I had this issue, I wound up resetting the whole town. Mail and paper arrived promptly at 3pm. I've now gone 2 sim weeks without mail, despite resetting the town (usually, I find a townie buried up to their necks in a sidewalk).
Edit: Ok, so after clearing caches and restarting, and resetting again, it didn't work. I decided to do a save as to tinker around, but this save as file is working. Go figure.
Edit 2: Well, nevermind. That worked for a whole two days. Now I'm back to no mail and no paper. Clearing caches, factory reset, resetting the town, nothing works. I've given up.