The email message contents say the sender
is joe@example.com but the originating
mail server is owned by advertiser-d00dz.net
and was routed through cdns and isps that
example.com is not known to operate, based
on a wide swath of reliable analytics from
several million other messages previously
processed and known to be legit example.com
messages.
Those are patterns that very large email providers know about.But if you are running your own mail server, and using squirrel mail, you, a lone individual cannot analyze mass traffic patterns.
One Ring To Rule Them All:
Everyone only uses gmail, and there is no
other provider, resulting in monoculture,
and we all get spied on, not just by the
NSA, but The Corporation too, but at least
there's no spam. That last guy that tried
spamming was turned into soylent green.
As for pixels, uh, images don't automatically load for all people. I haven't permitted a banner image to load in eons.I also don't visit links that I cannot understand, especially for domains I don't recognize, but that's because I know better.
Yes, yes, cookies, web mail, javascript, event bubbling and capturing, hovering, ajax, json, oh noes. I get it. We get it. We all get it. But grandma does not.