Working overly tired caused me to use the wrong web.config file in my application, therefore applying a permanent redirect on the wrong URL!!
I was meant to convert:
http://www.mydomain.net to https://mydomain.net
but, I did this instead (notice .co.uk):
http://www.mydomain.net to https://mydomain.co.uk
Our .co.uk domain isn't used anymore but we still own it.
I managed to delete the rule pretty quickly from the config file, as luckily it's in development stages and nobody would have landed on it anyway, and I also deleted the rule from IIS too. However, my browser still gets redirected to the wrong domain but other browsers don't. So I assume everything is OK apart from my browser has cached the rule somehow and somewhere.
Have I done any permanent damage to how my site will run in the future and do I need to do anything else to remove this incorrect rule?