Sounds unbelievable, doesn't it? Clearly Gmail use their Spam 'detection' as a non-stop alpha version test-system, there's generally an alarming number of false positives in their Spam folder, or, wait, they don't call it a folder, they *label* it as being spam. I have been running my own mail-server(s) ever since the BBS/fidonet days in the 1990s, and I can assure you, the reader; I do know how email works, I know what each header in an email means, I know why and when it gets blocked, bounced, deferred, queued, tagged, blacklisted, you name it. Been there, done it all. And that's why I'm so fed up with google's attempts to monopolize the email-sphere by forcing all other mail service providers to jump through unpredictable hoops in order…