"Suspicious Links" in a bona fide email

The Link Guard feature in Norton Safe Web offers protection from unsafe hyperlinks when you access them in your web browsers. It looks for the reputation of the URL's that appear in your emails and social media pages. If any URL is found suspicious, Link Guard provides a warning before you open the website or before sharing the URL with your family and friends.

On finding the suspicious URLs, Link Guard highlights them in red and the pop-up appears over the suspicious URL.

The Link Guard feature is available for all users who have installed the Norton Safe Web extension. To know how to turn off Link Guard, see Turn off Link Guard in Norton Safe Web.

https://support.norton.com/sp/en/us/norton-identity-safe/current/solutions/v130461421 

TrishS:
Norton has highlighted some of what I have typed in an email as a "suspicious link". This appeared when someone replied to my email.

What I actually typed was 10.30.AM which is not a link anyway, and there's nothing at all suspicious about it!! Why on earth, and how can I stop Norton doing this!!!

Maybe, because there is a dot after 10:30  -> 10:30 dot AM  -> 10:30.AM
Maybe, try 10:30 AM or 10:30AM -> without the dot after 10:30
Maybe, Norton thinks 10:30.AM (with the dot) is a website address

10:30.AM -> Copy link =

http://10.30.am/

https://safeweb.norton.com/report/show?url=http://10.30.am = Caution -> Suspicious