Verify that an email you receive from Norton is legitimate
https://support.norton.com/sp/en/us/home/current/solutions/v71088498
What to use to replace antispam feature!
https://community.norton.com/t/what-to-use-to-replace-antispam-feature/241158
What to do if a scammer has your email address
https://us.norton.com/blog/malware/what-to-do-if-your-email-is-hacked