Hi, FastMail employee here.

Just to clarify ahead of time, what's happening is literally all the blog post says - we're getting off of Opera hardware and networks and on to our own.

For end-users, nothing changes. There will continue to be a secondary DNS and MX service in Iceland. We're continuing to hold a live emergency replica of all our data there. And that's all. No new services, no precursor to non-US hosting, nothing.

As the blog post says, the _only_ reason it might be of interest is if you've hard-coded the old IPs somewhere. If not, then there's nothing to see here. Sorry to disappoint you ;)