I have been trying to get involved with microniche sites, and one problem I faced was Gmail would require a phone verification when creating an account with them. With google adwords, adsense and all other google services, I did not use other mailing services and stick with google. After I created certain number of google accounts with one phone number, It started saying that I have created maximum number of accounts for the phone number. I tried to find other ways to get around with it and none of em would bypass the verification. So my final solution is to create an google apps account for the domain since all the micro sites will have individual domains, i can create gmail account with google apps standard edition. so the email address will be "xxx at mydomain dot com" and you can just go to gmail and use "xxx at mydomain dot com" as username since it is associated as gmail account. I tried to buy a virtual online SMS number, but simply they were expensive, instead, this method is the cheapest if you buy 1.99 info domains.