I have created a couple of custom forms and as far as I can tell they are
working fine.

I have 'Run this Form' and sent it to myself and it works but when I try to
send it to others it is never received. When I CC it to myself I receive it
but the other recipients don't.

I do not get a bounce back saying it couldn't be sent - it simply disappears!

I have not distributed it onto others yet - I have simply sent the form to
see if they can view it.

Is this a problem with the form or with my email server?