@HighlandLawyer @neil There was that instance [¹] where somebody's objection to a planning application wasn't taken into account by the planners because it was rejected by the council's spam filters because it contained the word “erection”.
So the mail was delivered to the recipients (the council) but they chose (by using a spam filter) to not read it. So who takes liability for the spam filter?
[¹] I was going to write “case” there but I don't think it went to court so that might have mislead.