I mean, I'd report it as spam rather than as 'malicious' so I disagree with the GP on that part, but... > sometimes I wonder if spam is such a big issue in par

I mean, I'd report it as spam rather than as 'malicious' so I disagree with the GP on that part, but... > sometimes I wonder if spam is such a big issue in part because users report anything they don't want in their inbox, like a newsletter they previously signed up for, as spam or similar It's been a problem ever since some green card lottery lawyers decided to spam Usenet and then moved on to using botnets and whatnot while people fought back with DKIM and SPF and such, so I doubt it. > This doesn't hurt paypal but might annoy a small email hoster that might have to clean up your mess. It's not clear to me why Paypal would be routing emails through a small email host and most people are using the few big webmail providers at this point. > If you want to hurt them I don't think people want to hurt Paypal, they just want to turn off the damn marketing campaign when they're literally banned from the service. Personally, I just set up filters to dump all the junk like the constant emails from Amazon so that I don't have to deal with it.