Have a Verizon phone (three different ones, all do the same here). Verizon's latest update to their cellphone SMS servers? You can no longer be allowed to send blank emails. You get a warning after trying to send the activate@zooomr.com email (zooomr requires sending a blank email to this address). The warning states: From: Empty message - must have subject, text or attachment.

Adding---
And, also, doesn't zooomr mean to send an SMS rather than an email? Most Verizon phones don't have email clients - at least not the Voyager - so I am still not clear on this procedure.

I have done the other way , too (sending the phone activation from zooomr) but when Replying, again, I get the Verizon SMS warning to not send blank emails.