After making the code modification the form submitted and went straight to the 'thank you' page. 30 minutes later still no email from the website.
I then experimented again with changes to the "$WAGLOBAL_Email_Server" value.
1. "" (as per instructions and Neilo)
2. "localhost" (as per Adobe DT)
3. "mail.domainname.com" as this is the Mail Server Name given to me by the hosting ISP.
The other details from the hosting ISP are:
POP3 + Imap Server = diabled
Spam filtering = disabled
MailSscanner / Virus Scanner = disabled
Thanks for your help so far and I await further instructions,