I have a blog at Blogger.com and I have purchased a custom domain from a third-party provider. On Blogger, I have set the original address ihatemeteorites.blogspot.com to be redirected to ihatemeteorites.cz. Now, let's say I die tomorrow (after a meteorite falls on my house). After a year or so, the third-party domain expires and no longer exists or worse, someone else buys it. The question is: Will ihatemeteorites.blogspot.com be redirected to ihatemeteorites.cz even after the domain is expired and will my blog therefore become inaccessible and lost forever? Or can Blogger tell somehow that the domain has expired and will disable the redirection automatically so that my blog becomes accessible at ihatemeteorites.blogspot.com again?
Possibly Blogger could choose to observe that the domain has expired and disable the redirection automatically so that your blog becomes accessible at ihatemeteorites.blogspot.com again.
But for now, they don't do this. Visitors to your blog will continue to be redirected to ihatemeteorites.cz even once someone else has loaded entirely new content to that domain.
(Your best bet is to keep away from meteorites!)