Ok folks I have figured out the reason for why so many people are having problems with the given email address for applications.
I went back to my Outlook and realised that with all the scans of licenses and logbooks etc. the actual email was around 20MB in size. Some email accounts cannpt receive emails over a certain size. I then compressed all of my attached documents so the whole thing was under 2MB and presto it sent and I received the automated response form Copa 5 minutes later.
For all that have had problems I suggest you use Microsoft Photo Editor and just compress all scanned images, then resend. It should work.................good luck to all!