In Australia, I once tried to oppose from receiving mail (traditional mail) from charities at my workplace. It started when I donated to one of them, but I don't want my employer to be aware of my political opinions and I had mentionned it in the "comments" box. Turns out charities are allowed to send unsollicited mail repeatedly even after my opposition.
I can corroborate that: there's one high profile charity in Australia that refuses to remove me from their mailing lists (both email & postal), despite numerous unsubscribe requests (both through their software & direct requests). It's incredibly short-sighted. I have donated literally 100x as much to other charities that respect my requests, and I will never support that one charity again.
I'm in Australia, and this is exactly the case. Unfortunately 99% of the emails are from off-shore providers that don't give a damn about these rules. I've setup Thunderbird rules that manage to filter out most of them without me seeing them.
Indeed. Not sure about your country, but in mine, any non solicited commercial offer via email is spam and is illegal.