Emailing guests from weddingwire

Hi, I am trying to email guests directly from weddingwire to ask them to save the date and do easy RSVPs from WW. However, I don't see the option to email all guests. You can only copy and share your website from the "share" feature and it doesn't auto-populate emails. I'd like to avoid using another tool like paperless post to communicate with guests. Please help. Thanks!