Hi there, thanks for the reply.
I think I just got a bit muddled when testing the emails. I am sending out an automatic response to queries (well directory submissions to be more precise) and I have included a link. If I simply write www. somelink.com shows up on Gmail and Outlook. If I add <a href="http://www.somelink.com>www.somelink.com</a> it does not show up as a link on Gmail but does on Outlook. I think the conclusion (in this case) is not to add html.
Don't suppose anyone knows of any tutorials on coding for different email services/applications? I'm finding it a little confusing.
Andy