In response to the comments above, let me handle them all in one go.
Firstly, yes this is the thing that I have been using (or had rather, til I saw it won't work due the limitation mentioned), for over a month now.
It seems, as has now been answered by others, that the only difference is that it's getting wider coverage now. There is nothing new in this build, from the publicly available beta over a month ago.
This leads on to the next point - that as it is the same version, and nothing has changed, then again let me indicate that it is ZERO use to any user with their own domain name, unless their REAL email address they use and give out, owning the whole domain, just happens to be exactly the same as the Email address used as the login to that person's ISP Email package.
And for the vast majority of people owning their own domain name, this will never be the case.
So if your real email address you use is "[email protected]" then this application will NOT WORK AT ALL for you, if your login address for your ISP mail is "[email protected]" or ANY other generic name you may have used (exactly as you are encouraged to do, to avoid spam etc).
This means that as such, it is no different to any of the long standing and old "Push Email" applications for mobile devices, such as the system "3 UK" and others use for their Mobile Mail solutions.
Beta version or not, this is a massive shortcoming for Nokia, when all that is needed is one single extra question/option, so that you have:
Actual email Address:
Mailbox Login Address:
Login Password:
That would make this work, simple as that.
Finally, in response to Steve's point about already having Push Email, let me just say that I long ago gave up on using Nokia/Symbian's Inbuilt Mail Application combined with IMAP as a solution to this.
As on every single device I tried it, and across multiple Email Accounts and ISP's etc, it did one of two things, as described by others already in the comments above.... It either hung my phone, or if set to "Push", it opened a data connection, kept it open constantly (which might well of course be necessary), but then failed to actually then push the mail to me at the relevant periods thereafter the first receipt.
Only if I disabled "push" and instead chose a frequent Polling period, did it actually check for subsequent emails, but then, as mentioned, often causing my phone to freeze.
So the inbuilt Email app on nokia Symbian phones, is as already well covered, pretty pathetic.
I had hoped this new Beta Solution would be the answer to my prayers, but because of the old old issue I highlight, it won't even work AT ALL for people like me.
Oh well. A short term solution is currently to have my real ISP forward on my mail to a Gmail address as well as my real mailbox. And then to use the JAVA Gmail application on my fancy Symbian Smartphone, to read my mail.
Very old fashioned indeed as a solution etc.
But, as said, this is still Beta, so they MAY choose to change this in later builds. I fed back my findings to them over a month ago though, and have not heard any word back yet I don't think.