Who knows what will happen with at, but with e-mail owning your own domain is no longer sufficient to participate in e-mail federation. I have a domain, which

Who knows what will happen with at, but with e-mail owning your own domain is no longer sufficient to participate in e-mail federation. I have a domain, which I use for e-mail and multiple times per year I need to use gmail to get reliable delivery of e-mail. My mom is even caught in a Kafkaesque bind with one company where they told her that to access her account, she needs to change her e-mail, as they refuse to deliver to domains registered with GoDaddy (yes, registered, regardless of e-mail host), but she can't log in without getting a security code to her e-mail.