We need to use the set-emailaddresspolicy cmdlet to set the the exchange 2010 server to be able to manage the recipient policy, run the command in this article to fix this issue. The specified e-mail address policy couldn’t be edited. E-mail address policies created with legacy versions of Exchange must be upgraded using the ‘Set-EmailAddressPolicy’ task, with the Exchange 2010 Recipient Filter specified
If you think your website is running slow there there are a number of things to do to improve page speed.and loading times. If you are on wordpress there are also alot plugins to aid this, follow this guide on how to improve your websites speed.