Email address validation using ASP.NET MVC data type attributes
If you are using .NET Framework 4.5, the solution is to use EmailAddressAttribute which resides inside System.ComponentModel.DataAnnotations.
Your code should look similar to this:
[Display(Name = "Email address")]
[Required(ErrorMessage = "The email address is required")]
[EmailAddress(ErrorMessage = "Invalid Email Address")]
public string Email { get; set; }
Try Html.EditorFor helper method instead of Html.TextBoxFor.