Yep. Basically the big email companies have outsourced their anti-spam filtering problem to the email service companies. I used to run my own email server for

Yep. Basically the big email companies have outsourced their anti-spam filtering problem to the email service companies. I used to run my own email server for around 15 years with minimal issues, but I gave up when my mail started disappearing into the hotmail/gmail/yahoo blackhole.