[e12e]

Google is particularly insidious: gmail will happily throw away email (not just mark as spam) to "new" recipients, while your own account, which will usually already have a "relationship" with your domain, might receive email just fine.

I just recently had an issue where I tried to send an email to a someone I'd just met. The cc-part that went to my gmail-account got through fine. He didn't even receive spam. After I set up spf, I successfully sent an email to the exact same gmail address.

If gmail had rejected the mail, there'd be no problem -- then I'd know that I'd have to take action. Quietly eating the mail... not cool.

I wonder how long until the only way to send email into gmail/outlook is to set up routing rules that send email to gmail/outlook addresses by logging in to those respective services, and sending directly, bypassing traditional unauthenticated smtp... presumably setting up one "major" delivery would be enough, as gmail can't ignore outlook.com and vice-versa...