Hi Rakesh,
Do you represent or work for email.biz?
Infact even official email ID's, which earlier could be accessed only in offices by logging onto Microsoft Outlook, can be accessed even after office hours via Email.biz. And in no way will your account's security be compromised. You can use Email.biz to access your official email and still keep your ID's, passwords and email messages absolutely secure.
I have some issues with this statement. First, no service is absolutely secure. Also, sites that collect 3rd party logins are better targets for hackers/phishers since they can potentially gain access to more accounts per compromised user. Last, how does your service get into corporate exchange accounts? It sounds like if it's possible at all you need the users OWA settings, or it isn't possible and is a misleading claim. Either way, an employee providing the login credentials for a company email account to a 3rd party site is likely a violation of the users corporate IT & security policies.
From the free account section of the web site:
Get anyname @ anydomain.biz
That also is not true, your service does not have access to the email hosting for every domain within .biz.
The service claims to have access to over 15000 biz domains. That sounds more plausible.
Is this mail service associated in any way with a .biz domain registrar? Are you buying up domains as the expire?
Overall, the above post is either a really bad SEO job, or a bad review by a service stakeholder.
Either way, as is, I'd caution visitors and advise them not to try the service.
Some people like to try new accounts, I'd warn them not to link other email accounts.