Hi @michaelsft
Adding mail server records into Netlify DNS (which I gather you are now using) is possible.
However if you are wanting LCN to handle mail through forwarding to another address (which is what I believe you are wanting to do), you would (likely) need to use LCN’s nameservers and not Netlify’s.
Have a look over [Support Guide] How can I receive emails on my domain? for more information on this very topic.