Email Regular Expression

[asp:TextBox ID="txtEmailId" runat="server"][/asp:TextBox]
[asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="txtEmailId"
ErrorMessage="*" ValidationGroup="gpRegister"][/asp:RequiredFieldValidator]
[asp:RegularExpressionValidator ValidationExpression="^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"
ID="rxpEmail" runat="server" ErrorMessage="Email Address is not valid" Text="*"
Display="Static" ControlToValidate="txtEmailId" ValidationGroup="gpRegister"][/asp:RegularExpressionValidator]

WCF Bindings

[system.webServer]
[validation validateIntegratedModeConfiguration="false"/]
[modules]
[remove name="ScriptModule"/]
[add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/]
[/modules]
[handlers]
[remove name="WebServiceHandlerFactory-Integrated"/]
[add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/]
[add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/]
[add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/]
[/handlers]
[/system.webServer]

[system.serviceModel]
[serviceHostingEnvironment aspNetCompatibilityEnabled="true"/]
[services]
[service name="OfficeBeacon.Service1" behaviorConfiguration="OfficeBeacon.Service1Behavior"]
[endpoint address="" binding="webHttpBinding" contract="OfficeBeacon.IService1" behaviorConfiguration="WebHttpBehavior"]
[identity]
[dns value="localhost"/]
[/identity]
[/endpoint]
[endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/]
[/service]
[/services]
[behaviors]
[serviceBehaviors]
[behavior name="OfficeBeacon.Service1Behavior"]
[serviceMetadata httpGetEnabled="true"/]
[serviceDebug includeExceptionDetailInFaults="true"/]
[/behavior]
[/serviceBehaviors]
[endpointBehaviors]
[behavior name="WebHttpBehavior"]
[webHttp/]
[/behavior]
[/endpointBehaviors]
[/behaviors]
[/system.serviceModel]