I cannot have the form submit to an email address which uses the same domain name as the site. All other email addresses work fine.
My site is hosted with Rackspace but i do not have direct access to the control panel. The domain name and email is hosted with Fasthosts. I believe the problem could be that Rackspace isn't sending the email and I may need to talk with them, so instead I tried WP SMTP but I get "some errors" when I try sending a test mail. This could be Fasthosts problem, I'm using one of their StarterPlus emails for this purpose. I have also tried using WP Mail Options plugin but this also doesn't work. Sending a test mail here appeared to send successfully but it never arrived.
So between Rackspace and Fasthosts I have no idea how to sort this.
As a work around I am sending form submissions to a gmail account which then filters the different forms and forwards them to firstname.lastname@example.org.
Can anyone prompt me as to where the problem likely is?