It worries me a lot that people clicking "mark as spam" on messages from legit companies because they subscribed to the newsletter will mean that my messages with important information (order confirmations, e-tickets etc.) will get blocked.
> It worries me a lot that people clicking "mark as spam" on messages from legit companies because they subscribed to the newsletter will mean that my messages with important information (order confirmations, e-tickets etc.) will get blocked.
They probably didn't subscribe to the newsletter, they were subscribed, or tricked into subscribing. Either way, it's spam, and legitimate companies do not mix transactional e-mail ("order confirmations, e-tickets, etc.") with marketing e-mail.
FWIW, I'm one of such people clicking "mark as spam" on marketing e-mail, and I do it intentionally.
Don't send spam and I won't mark it as spam. I didn't sign up for your newsletter, don't send it to me. Creating an account or placing an order does not mean I agree to your spam.