Octopus Energy posted me a 321 A4 page electricity bill printed out on paper as a physical 5cm thick package (on their "Agile tariff" the rate changes every half hour, so there are 48 line items per day). I enquired as to why they'd done that?
Apparently they tried to email it first, but the 15 MB email exceeded my email server's size limit, so they posted a hard copy instead.

@tim Is it any wonder this country is so messed up

1. Why not make it a HTML page on a website
2. Why not make it downloadable, usually pdf or erk DocX Ideally include odf
3. Send e-mail linking to said document

@zleap @tim I think it should also be possible to get the pdf size below 15MB. Isnt it mostly black and white text?
@Martinius @zleap@qoto.org I ran it through ghostscript, and that shaved 34% off (no change in quality). That is still apparently slightly too large for my mail relay (after mime base64 encoding) but after the radical innovation of splitting it into two PDFs, I successfully sent it to myself in two emails (from a different email account hosted elsewhere).
Octopus make all of my historic bills available to download via an AWS URL, so I suspect they are paying 34% too much on their S3 bill.