Seems to me that perhaps "reply all abuse" is indicative of poorly chosen recipient lists.

(Which doesn't help if it wasn't you who sent the original mail…)

Yeah, I'm a recipient. Professional body that has god knows how many members who use the reply all to ask each other for coffee. I tried binning their emails but that caused havoc with bills/body requirements. It's awful.

Sounds more like a people problem than a email problem :)

Sounds like they need a non-work mailing list.