Continuing the Weekend of Inane Web Design, GMail has decided email it sends itself must be spam.
Backstory: If you want to be able to send email using an alternate email address in GMail, GMail first sends an email to the alternate address with a link to verify you own the account.
I did this earlier today. My verification email would be coming straight to my GMail account, which receives all messages sent to the alternate address.
I kept waiting, and waiting, and the verification email never came. After about 10 minutes, I checked my spam folder. Guess what GMail thinks is spam? GMail's own administrative emails. Click for the larger version:
I went ahead and opened the message and clicked "Not Spam." That way, you know, they might eventually figure out their own email is not spam, though the miracle of Bayesian technology.